I'm going to try to answer your questions, but totally from memory as I am mid move and away from my 1e stash.

1) Yes. I always ran trick shot to allow for use with multiple shots. But, try not to just use the power a a numerical advantage. You should be able to reasonably describe whatever your character is doing in terms of some sort of trick, and not just being really good at shooting everybody. At least that's always how I ran it.

2) Eagle Eyes could half the range modifier, and then Trickshot could half what ever was added by the the trick (so functionally all...