"Monster Hunter" Discussions

So yeah, if anybody could give me some decent advice on slaying Plesioths and Cephadromes, that'd be awesome. Because I have problems with those two monsters. I even think an enraged Tigrex is easier to take down than a Green Plesioth, but that's just me. I've slain about a good 50+ Tigrexs already, so I got used to it's attack pattern. @____@;