Which items work well / don't work for Boss battle's?

[WhYdOyOuThInKtHaThApPeNeD]

I've played it through a bunch of times. It always gives the exact same calculations if I make the same moves each time.

78 Guard Droids summoned, always 78

Guard Droids do 172 damage

Troll does a critical blow for 6545 damage killing 65 droids

Guard droids do a critical blow for 61 damage

Troll does 4194 damage to droids killing 13

It always gives the exact same figures for everything, every single time, no matter how many times I play it. Always making those critical blows each time.

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For the damage done by the Driller, I've run through the first 3 strikes many many times. It always does:
347
878
355

This is the interesting part:

If after the 878 strike. I move the Troll and hit the Driller from a different angle. When the Driller strikes back it does 346 damage instead of the usual 355.

This is also consistent. If I always move the Troll to that spot and hit from that angle instead, the Driller will always do 346 damage on the 3rd strike instead of 355. Always.