First! skill up for rank 30+

[Sojiro]

I remember the low 30's giving me a bit of a hassle a well, due to most raptor sinew drops (going off YG info) is off higher level mobs than what my PUG could do. For the 30's I think I still used buffalo vamps up to 31-32 ish, then switched over to cotton singlets up to 34 when I finally started to break into my gigantoad stash and make toad leather and then some vamps up to where I am now. Go with cotton singlets if you've exhausted your buffalo leather supply (I never see to run out lol) or if you're past 31. I think Buff vamps was only giving around the 150-180 SP range at 32.

This is all of course mixing in getting as many local leves as possible. I can just now start getting into fleece although i'm still busting a larger percentage of synths on it than I really want to, so i'll hold off on going full blown fleece probably for one more rank.

Edit* Btw forgot about diremite sinew cords. Another great method in the low 30's to get some skill ups. Not really a ton of concentrated diremite areas, (aside from ones that are fairly higher level) but still another option.