Is emsam a less harsh maoi? what about diet restrictions and medication restrictions?

i have tried every anti depressant known to man i think. i've gained a ton of weight with zyprexa and feel that after 7 years it has stopped working. i take prozac, wellbutrin, xanax, and zyprexa and have for a few years. it just doesn't seem to be working for me. my pdoc talked about maoi's but i'm scared of having a stroke if i eat the wrong thing. i am tired of being overly medicated also. she wants me to try the emsam patch but i break out with adhesives and it gets real sore. which maoi is less likely to make me gain weight? it seems like what i've read is parnate and nardil would be good choices. it's going to be hard to go off all my meds completely. help?