A few Quick questions on Familiars

iirc Big Spider/Mutant Pig familiars are 1.4x drop, but that's just from memory. Castellan Toad is 2x drop, but gl getting it ^_^

Mutant Snail for party HP/MP is the best if you're high enough level.

All those familiars are 1.6x drop. The only 2x item drop familiar is Wolf Underling. I have one from booster packs, dunno if it actually drops from the quest monster, so far I haven't heard of anyone who has found it. I've done about half an hour on 2x just to check it out, I believe someone here on southperry has done a few hours on 8x with no results.

You can tell the rate at which a familiar drops by the description of its buff, which you can find here.