well said g33k, but i would prefer, go to the highest rank, non G, Rathalos and sushify (as Bush would say) its tail.
I just wouldnt make anything that takes time like that. The only armor i spent my time to harvest materials for was Los Sol mail(silver) as i love the skill set.
but yea, LS + los tail = 5-8% chance for plate.
MRAHA