resistances where to get boosters

[Crystalion]

I did roll two charms, but nothing much came form them and I have not found any lately.

The beauty of Grand Charms of sufficient ilvl (i.e. nm act 3 or later) is that you can continue to reroll them with 3 perf gems over and over *until* you get something you like. Once you find such a GC you're set, provided you have a steady supply of gems... for that I think you'll notice that flawless gems drop quite frequently, so you merely have to dedicate 2 + 2*7 = 16 slots max in your stash or on a mule (up to 2 perfs, since at 3 you'd use them to reroll, and up to 7 gem types times 2 flawless each, since at 3 you'd cube to a perf). Additionally you'd use a 3x slots for the GCs you'd want to keep on hand to reroll.

Naturally some will object that Skulls are rarer than the other 6 gem types, and have a valuable rare reroll recipe, but you should do whatever works for you (e.g. some people trade "great" stuff for "good" stuff that they actually need, and I think that's just fine).

BTW, if you can kill the nm Council in Trav quickly, they seem to drop GCs quite often.