That is nothing, you can combine the three powers of yourself/team you do extra damage, and there is an achievement for it. It is pretty awesome when you use one teammate to use pull on an entire group of enemies through the air, while another overloads their shields, and then you follow up with a warp that detonates all of the biotic abilities at once.

Also if you find that you are facing a tough enemy that your biotic abilities seem too weak to affect due to armor/shields, multiple biotic abilities used at the same time will pretty much override that problem. A full health krogan that is normally a rock, will fly through the air like a feather if given enough biotic encouragement.

As far as single ability goes it would have to be Slam. It is powerful, throws a enemy up into the air and then back down, and the best part has a short cooldown so it is easily spam able. Between using slam to breeze through the weak opponents, and then combining powers to take down the hard ones, there is little I can't handle even on veteran (current difficulty), I imagine you just have to be even better on hardcore or insanity.

Sorry didn't mean to write more than the original post, but there are just so many amazing things about this game...

my favorite biotic is the power of anticipation. that's the one where you are overseas for six weeks and have to read about everyone else playing the game that you want to play. two weeks left!

Ahhh, the anticipation power. I've heard if you use that power exclusively for a while you can upgrade it to one of two bonus powers: the "desperation" power - which enhances your "grumpiness" skill tree - or the "builds character" power - which gives you an all-round boost to your stats.

Steve, have you found any biotic powers that help you achieve the romantic subplots?

I never enter into any romantic endeavours without using the "clear the pipes" power.