No, most of this stuff makes more sense elsewhere. Most of it isn't really 'triggered', which I would consider something you remember when it's not your turn.
Shadow Walk should be with defenses. It's not so much triggered as you need to remember if you moved.
Likewise prime shot should be part of your attack section. You don't trigger it, you remember it when you attack. Blood hunt belongs here, too.
Infernal wrath is a minor action to activate. You don't need a trigger, just remember who attacked you last round and decide if you want to spend the minor.
So, in the end Dark One's Blessing is the only valid trigger (i.e. I want to look at that box when it's not my turn to jog my memory). And you don't really get too many more powers like that as you gain levels... warlocks all get a single one at 1st, and they can improve a bit, but I'd like to see a character with more than 4 really triggered abilities (not saying it can't be done, I haven't digested half of 4E yet).
EDIT: May be easier than I thought to get 4+ triggers at higher levels. But you'll be devoting a lot of your powers to them...