I found a strategy that might be viable for runs in level 5. Its a hybrid of the IL strat and the normal strategy. It should save 1 to 2 seconds in the run if its viable.

From what I see, the first clip is easier?

That seems to be pretty much like the run I submitted earlier: https://www.speedrun.com/toxic2/run/z1ld38rm

It's not shown on the leaderboards by default. To see it there, you need to click "filters" and turn on obsolete runs