Yes it gets access to cross classes that do it, but we were talking natively, lancer is kind of straight forward in that respect. As for lancer not supposed to be getting hit, this move isn't meant to make you want to get hit, it's for situations where you are getting hit, e.g when solo. So that you have a chance to use your positional moves. In situations where you aren't getting hit you'll be able to get to the mobs flank and back by yourself. As for spine shatter dive and leg sweep, I said that it is designed as a move to get to the flank and rear without building stun resistance by using those moves, so you can save them for when you actually have to stun something.