Alright, I tried the IL speedrun, and this is one of the luckier attempt without abusing pause midair that I managed to record, which can be improved further if I didn't fail the bat strat first time: Overall, when compared to IL time in any% WR run, it saves maybe around 5 to 15 seconds or something, which can vary a lot depend on your luck. But man, the amount of luck required to get a perfect bat strat is insane, considering that quite a lot of seconds can be wasted for every failed attempt of bat strat, which will likely happen thanks to its unpredictable movement. And sometimes the bat might even take too long to fly to lower altitude to start the bat strat. And not to consider that I have to do this multiple attempts to actually even get this luckier run (which isn't perfect yet), which like gluki said, there is not much ways to find setup to do this consistently yet, and using this strat in any% full run might kill it easily most of the time. So, I think this strat is more doable in IL speedrun, but yeah, who knows if any extremely lucky expert player might get WR in any% full run using this strat one day?

Hi everyone. Its been a while, but recently a new strat is discovered which can skip the entire section of room with spikes in Level 9 by using a bat. However, the movement of bat is very unpredictable, so I wonder how feasible it is to use this bat strat in any% run, and if there is any timesaving possibility compared to current strat: