Hey TRRW:
I took 16 cha, 14 con, 14 int, 13 wis 10 dex 8 str, as a tiefling, this finalizes out to 18, 14, 16, 13, 10 8, I guess I could drop int a bunch, but its a prime warlock stat, where dex is supposed to be completely unused, with the exception, apparently, of Feats Warlocks care about.