My route for running any% BoD VII

Here is my basic route for this game for any% easy. This does not include directions; please follow a video for those. 

Before we begin, the fastest mashing technique in this game is mashing on a Controller and a Keyboard at the same time. We take no issue with using an external program to bind the "confirm" key to a different button on your controller (because controller+keyboard mashing is something you can't really prevent, and trying to enforce that someone is mashing on keyboard and controller separately is essentially impossible). I personally bind L1 on a PS3 Dualshock 3 controller to be the confirm button (defaults to Z on the keyboard) as well as X. 

-Character Levels: In a nutshell, I take Option A for every single level except for these ones. This is because it is faster to mash through and the benefit for option B is generally minimal compared to how much time you'd save just by mashing through.

Dem: Take option B at level 23 and 24
Sara: Take option B at level 3, 5, 6, 7, 8***, 12, 13, 14, 16, 17, 19, 23, 25, and 26
Lita: Take option B at level 8, 9, 10, 12, 13,  20, and 26 
Erik: Take option B at level 25 and 26

***The single most important time to pick option B out of any of these. Most of these levels, if you make a mistake it doesn't necessarily mean your run is over, it's just less optimal. If you don't pick option B at level 8 for Sara, reset the run. This is the level in which she learns Escape, the most important skill in the run.

You should not go above level 26 in a run. 

-Unlike Cthulhu Saves the World, you will need levels to keep up in this run as you have much less at your disposal, up until near endgame.

-First Cave-

First two trolls: Mash

Grab the left chest (200g). I'd suggest also getting the potions on the right to be honest, they can help out a lot in later boss fights. You're going to want to save 4 potions at least for the final boss, so more is definitely safer. 

Troll Boss: Mash 3 attacks, then quickly select deathblow. This fight is over so fast I often mash down on the D-Pad to try to use multi-strike

Go to Palad-Lennus (town). Buy Sword/Staff for Dem and Sara. Pick up Sara. Equip items, and leave. Head east to Grave Pass.

-Grave pass-

Different encounters have different strategies. Ghosts die to 2 attacks regardless (one from each). Crows will die to 2 attacks regardless. Both of these will die to Fire and Ice (Unite) after Sara gets a few levels. Zombies will die to 1 deathblow + 1 attack (Sara). Skeletons die to 1 Multistrike + attack. 

BOSS: The Reaper

I just use Deathblow until I run out of MP, and mash attack for everything else.

Leave Grave Pass, go to Lufestpolis (next town). Buy Dem a sword from the shop and equip it. Heal MP at the inn. Head east to Small Ruins.

-Small Ruins-

Once you get Lita here, you will be using Bone Storm (Unite) for every encounter. It one-shots every enemy other than Ghost Cars, who you can just mash attack through. You should be able to get to the  heal point before running out of MP if you use Bone Storm once per encounter. 

BOSS: Junk Monster

Dem: Deathblow Junk Monster
Sara: Snowstorm Twice, then attack Junk Monster (You do not want to kill the ghost cars before he dies)
Lita: Zap Junk Monster

Once you're done here, head north for Water Cave.

-Water Cave-

Most waves in this cave will die to either 1 Bone Storm + a few basic attacks, or a snowstorm + lightning if Dem is low on MP. The key thing to grab here is a Rifle, for Lita, which allows her to take on the Dragon. After about when you get the Rifle, you should be able to use Sara's escape 4 times to escape 4 battles before getting to the Dragon.

BOSS: Dead Dragon

Dem: Multistrike Turn 1, Deathblow every turn after.
Sara: Relic (Unite) Turn 1, Snowstorm every turn, except for healing if Dem or Lita get low.
Lita: Sniper Shot every turn

This is the part of the run where not doing unite buffs turn 1 can really hurt you going forward.

Head to Motherbound Castle. Use escape on any encounters you get on the overworld. In Motherbound, buy a Bloody Axe for Erik. Go to the castle, get arrested, and jailed. Equip Axe to Erik. You should be able to get through this dungeon without fighting more than 3-4 encounters (1-2 before the first save point, 1-2 before the boss). Try to make sure to kill 2 encounters with more than 2 enemies (especially the executioners) if you can. The rest of the fights you can escape from. 

BOSS: Usurper

Dem: Death Blow (Usurper)
Umi: Relic, Freeze Blast Usurper, heal if absolutely necessary (unlikely)
Lita: After Umi Relics, Sniper Shot
Erik: Smash one of the Knights (should 1HKO), then Smash Usurper the rest of the fight

Leave, buy Giant Sword (Dem) and Merlin Staff (Sara), equip, head out for Undeath Mountain. 

-Undeath Mountain

Run away from everything you encounter on the way, except for one encounter (cursed Souls are good to fight as they die fast) as you wont have enough MP to escape from everything.

Arrive at Langsong.

-Langsong- 

When on the first few screens, use Bone Storm to take out any mobs with 2 of the Cursed Cars or less. 3 or more of those is bad news. Once you get to the Subway, you should be able to run from every fight until the end. Make absolutely sure Sara is level 20 before the next boss!!! Without Heal Wave the next boss is darn near impossible. If you need to, fight Ooze Dragons in the Sewer. 

BOSS: Turrets

This is the hardest boss in the game. Probably going to want to make sure to practice it. 

Kill the Left turret first. If you notice you are on the cusp of killing one of them, then spread your attacks to take one out and get some damage on the other

Dem: Battle Cry turn 1 & 2 (It stacks), Deathblow every other turn.
Sara: Freeze Blast turn 1, Relic turn 2, Heal Wave or Heal every turn, until the second turret is low on HP (then Freeze Blast if you see fit)
Lita: Scorned Love (Unite), Sniper Shot
Erik: Smash until you run out of MP, then attack

All right, on to the final dungeon. Head west through the desert. You won't need to fight any more regular encounters for the rest of the game. 

-FINAL DUNGEON - THE LAB-

Movement here is a bit tricky. On screen 1, grab the IQ glasses for Lita and equip them. Keep on going until you reach the 4 Fakers.

BOSS: EVIL HEROES

The priority to kill is Evil Sara > Evil Lita > Evil Erik > Evil Dem

Dem: Battle Cry x2, Deathblow
Sara: Freeze Blast turn 1, Heal Wave every Turn
Lita: Scorned Love, then Sniper Shot 
Erik: Call Horde until you run out of MP then attack

All that's really left is the final boss. This one is a royal doozy, as this fight lasts way longer than you have MP to do a lot with. Use potions on anyone who dies.

FINAL BOSS: Ultimate Evil

Dem: Battle Cry x2, Deathblow until you run out of MP, Attack
Sara: Freeze Blast turn 1, Relic Turn 2 (potion with Dem if you have to heal someone), keep her on heal duty. Switch between Heal Wave and Heal depending on if a single target needs healing or if the party does.
Lita: Scorned Love, Sniper Shot
Erik: Regenerate All, Smash until you run out of MP, attack

Once Dem and Erik run out of MP, you can use either of them (especially Dem) for Potion revival instead of Sara and have her use Freeze Blast, as she has enough MP to last the entire fight. Good luck on this fight. Thankfully he has several attacks which bring you down to 1 instead of killing you, which matters a lot when you get to later turns when all of his other attacks can one shot someone. 

Congrats! With practice and a little bit of luck, sub-35 should be doable within a few days.