I was reading up on them and they seemed dead killy as they can take jump packs which = 18 inch assault range + deep strike ability. They can take terminator options except the all important 2+ armour and 5 + invul but unless your fighting ap 1 2 weapons they have feel no pain! furious charge! meaning that they strike first against marines. They are only 70 points full upgraded with jump pack and thunder hammer which is pretty cheap for what they can do! the only down side is rage but from i think you deep strike em behind a drop pod or something to block los then next turn unleash them on the enemy. what do you think?