Psylocke has no means of piercing his mental defenses. Wolverine doesn't have the force necessary to pierce his armor.
Thanos Omega Plan A!
Psyloce tries his telepathic attacks, but its nothing against Thano's mental defenses. Storm and Cyclops are blasting away at Thanos, not able to hurt him, they powers block his vision at the least. Iceman creates 0 degrees trying to freeze Thanos but to no avail, the man sleeps in deep space!. Meanwhile Kitty runs over and phases Thanos into the ground since he can't see through the barrage of attacks. Rogue Grabs onto Thanos while hes in the ground and tries to absorb his power. She goes mad with insanity and passes out. Colossus picks up wolverine like a lawn dart. Psylocke focuses her telekinesis to lock wolverines body solid so it can't go limp and withhold any force. Colussus chucks wolverine with everything he's got. Wolverine's claws pierce the Force Field, but like a recent xment comic, his human hand stops right there. Thanos sees the claws an inch from his face, and unleashes 1/5 of his power. All xmen are knocked out. The fight is over. Thanos goes and gets what he really came to earth for. A chalupa..