Mindrape probably would cause a stomp. He could just make them all forget who they are.
In terms of speed I would personally put Mewtwo at around the hypersonic+ range, at least reaction wise. He reacted to a hyper beam casually and I can't think of many beams of energy that wouldn't be moving at least at hypersonic speeds. We haven't really seen the full extent of his powers but he was able to move a large portion of land with a whole load of pokemon without it fazing him too much.
At 0:37 you can see he is at least a city block destroyer, probably larger given the scale of his attack in comparison to the mountains in the background and at 0:45 he created an explosion which engulfed the island he was born on. At 2:57 he casually throws Rhyhorn away.
Although I don't think he would win this fight based on power, I know Ichigo and Naruto are far more powerful but personally I think his psychic powers give him an edge here. Who knows thought maybe they can overcome his Psychic attack.