It seems to me that there are several "tiers" of power in RIFTS with regard to character classes. As I said before, you have character classes who get a bunch of skills nobody else gets, and there are character classes who have body armor that can withstand missile volleys and weapons that can slag modern tanks.
In a party of characters who are suited up in power armor or naturally have MDC hides, the poor Mystic generally runs around with his Chameleon spell up, or hides in the MDC all terrain vehicle and takes pot shots with his MDC pistol. I did feel a little useless, given that most of the session was devoted to mecha combat. However, there were a few times when my medicine skills and psychic powers were useful.
Combat in RIFTS is damn slow. It's no D&D 4th edition, by any means, but it was pretty sluggish. This may have been aggravated by the fact that my character was practically useless against missile-spewing SAMAS suits, and my four attacks per round officially made me the slow poke of the group.
That being said... the group was fun. I liked the players. If the group hadn't been so hospitable, I might well have written the game off. There really is something to be said for a good group. They aren't the type of folks I normally play with, but it was ok with me.
I was offered the chance to scrap my character, but I'm determined to prove that you don't have to be a combat god to roll in the RIFTS world. Maybe I'm just a glutton for punishment.