I've been reading those a lot today. Having a level 108 homunculus-S is a pretty big investment to ditch. I don't mind making the potter one a vani>eira. My main would go what, amstir>sera? Pretty much everyone I knew that played has quit so I'm flying solo until I can make new friends on here.
I guess I can remake main one if the end result is worth it.
If you think you will solo most of the time when doing big thing like MVPing, instances:
For the long run, amistr>sera. Tanky + painkiller. amist bulwark give +30 vit . And castling is no joke, it saves me many time. But amistr base is pain to level until you get sera's poison mist.
Or Vanil > Sera. Just download azzy Ai and turn on autokillsteal, easy levels. Got extra brewing bonus too.
If you think you prefer party play, go Dieter. Volcanic ash is so good for woe too
If you still has doubt, take time to walk around prontera, south pront field and lightalzen and see which homun has more popularity.