Originally Posted by
Seirin
Losing epistolary wouldn't be a bad idea, especially if you're taking divination where the power you want is the signature power.
Pistols on sgts wouldn't be a bad idea either.
I'd keep the camo cloaks though - you'll want your scouts to survive, and their best bet is cover saves.
As to your questions...
Melta is the king of anti-vehicle still, and that is really one of your main weak points atm.
Assuming you're starting your assault marines on the board, drop pods are fine as you'll be under your 50% reserve limit.
The typhoon thing is a yes - I assumed you meant singles anyway. Vehicle sniping is their game and being able to hit two a turn is better than one a turn.
Two points on the last question. 1; prescience from divination is a carte-blanch re-roll to all misses on the target unit, making it generally superior to a chaplain's re-roll. 2; don't stick all your characters in one unit without great cause. All your eggs in one basket doesn't usually work too well unless that basket is made of immortality.
I've PM'd you a few links you might find useful for the new psychic powers