The first placed goes first is not really that true, for me at least. I run Tobi, Hashirama and Fire Main with the Mirror Vision, I placed Tobi the first in my team and yet, when I see an Iruka in Space Time, he will always target my main, even if I have 3 masteries going off, but maybe Iruka's targeting is special too. Also, the AI seems to target the character with the least HP first. Chase skills which have an interrupt or immobile don't count as something special though. Even if I could interrupt someone with Hashirama's chase, I often see the AI targeting the person with the least HP, regardless if that character actually does a skill cast. And every healing/shielding jutsu will go off as soon as someone gets damaged even by 1 dmg(for heals) or as soon as they are available(for shields). Although, these are my own observations

But on a side note. As a newbie programmer, I find making an action list made by each player for auto play A LOT EASIER to code and more simple for us. If they made auto play, at least give us some sort of guide on how this thing works.

But I digress, if we figure it out maybe we could make a forum post explaining how this thing works precisely