0. I have to say that demon speedrun is not so easy as I think.

1. Although there are only 24 levels, but level counts from 2, which means you need to fight level 10's nartoth(41% difficulty), level 11's thareth(44% difficulty) and level 13's eastern forest(52% difficulty). For reference, demon's difficulty is 57%.

2. The speed of demon's unit are faster(+2 speed at start), but it also cause a problem that the units are harder to form a group. So the failure rate is very high.

3. It highly depends on computer if you want to save more time. If computer's units are tough or computer's unit sending are disgusting, you have to lose time although you play well.

Current strategy: Spearman rushing in one line in easy levels; Rush two times in different lines for spearman rushing covered by 3 swordsman in medium levels; Rush three times in different lines for spearman rushing covered by 3 swordsman in hard levels. You can send a spearman each line if you feel the whole strategy is not enough to fill the bar, but usually charge is ready after you finish the whole strategy. Money is used in upgradation first, buy the scout to save more time in last easy levels.