Yeah, I also love how this topic evolved

And to be honest, I didn't even use a single dose of clearence. On my 1st pic the bosses are at full health, and EM is already desecreated

Why isn't EM needed? Her only important boon is greenblood, but it's mana cost is keep rising with each cast. It would be much more mana efficient to just keep casting Cydstepp and hitting the boss with Martyr Wraps. Especially, if you worship MA and it costs a flat 8 mp.
If you didn't worship EM, you also would not need to waste mana for being able to convert out. No plant would steal your boosters, gold or shops. For an efficient player EM is actually a disadvantage

You seem to underestimate the power of MA: boosting max mana and taking mystic balance work fantastically together. This time I didn't even restrict myself on potion usage, so mana potions and a single schadenfraude helped me greatly.
And my early manapots knocked off some resists too, while as being an orc each glyph converted boosted my damage.
Plus MW makes all my hits grow stronger.
Yes, corrosion triggers on KB. That's the sole reason I brought the bearmace. It was meant to be a testing run, since I wasn't sure if the Goo's 75% resist will disable that. I mean with 25% KB, reduced to it's 1/4, you'd need 16 basedamage to deal 1 damage and the 2nd portion of corrosion damage, but luckily it doesn't work like that. Even with 5 basedamage it works.
I have no idea what the answer is for your last question, forgot to test that

Edit: forgot to mention my goal with this strat, I want to achieve that it works on all maps with 100% reliability even with the VT token added.