...and we have no idea what the party makeup is going to be.
We know that it's wise to fill the obvious two roles (damage, support), and we can pick our races and classes on our own. No crafting, no Mythic, but Prestige class(es) (that we qualify for) are leveled at the same time as the base class(es), except without BAB or saves.
We've been using a preset stat spread of 18,16,14,12,10,8 (not in stat order, and pre-racial) with permission of the GM, but he seems to be frustrated with how easily we kill things in Rise of the Runelords.
My only question is this: What kind of stats are reasonable for this campaign, enough to give the party a rather tough challenge without it being either too easy or too hard? Is 20-point buy too low? Etc.
Thanks in advance.