Today I got a reply from Evenodds on the Twitch TV channel (part of Anet staff) about blast finishers. He is a busy person on there, so do not want to bother him too much, so I thought I would ask you guys.
This is what he said “The first combo field down will take priority (for blasts and if you START a leap in multiple fields) for Blasts… otherwise it’s the first to interact with (for projectiles)”
Now, on my guardian i place the skill ‘Hallowed Ground’ down, do my number 2 hammer skill through it, then do my chain of 1st attacks laying down a symbol and do my number 2 hammer skill through it again, but it gives me retaliation instead of might. If it is the first one down, shouldn’t it be might? Not sure if this is a bug, or if it is for all finishers, or if he was wrong that it is the last one down the takes priority.
Also: I do get a x3 stack of might if i back out of my symbol, and use my number 2 skill, but kind of annoying to do in battle.