Originally Posted by
liquidformat
Your best fifth wheel is probably a druid; they are powerful all around and can fill any roll very well. Need a healer, they can summon a unicorn and have wands of vigor or lesser vigor. Need a BFC'er they got the spells for that, blaster/ranged attacker they got the spells for that, scout they can send their hand spider off to explore, meatshield they can buff wild shape and wade in with their animal companion.
Its really hard to beat a druid unless you want something off the wall or goofy.
What exactly are you looking for in your arcanist, there are many ways they could go?