Meth and LSD are absolutley awesome togther. This could be good too. But when I've mixed those two, I watch my meth intake more so than I would normally.
I personally wouldn't try that... the body load from 5-meo-dipt is bad enough... but then again, I wouldn't do 5-meo-dipt by itself for the same reason. If you do try it though, I would start with a very small ammount of meth and work your way up.