User blog comment:Vanguard13/Pick Your Poison (Ammo, that is)/@comment-70.143.72.149-20120811164220

AP ammo power. Goes through cover, multiplies damage impressively in singleplayer, and multiplies damage against armored bosses. Disruptor for squadmates to aid in dropping shields fast in singleplayer.

In multiplayer, incendiary and cryo since they have useful effects.