Useless in thinking that you can do the game your way and expect the summon to follow you in the way you think it should. The AI right now is pretty bad, but if you stay close enough to the mob/boss you want him to hit, he will hit it.
The best vids I saw regarding sorc were sorc1 necro2, simply because it’s too much to waste a rank only for controling a mob that auto-attacks already.
If you get Sorc3 there’s a point, summons level 15 are much stronger and familiar at level 15, with linker, does massive damage.
Even saying that I believe sorc 1 necro 2 goes better, simply because you can summon a sh*tload of monsters and just let them beat 8 monsters at the same time because link.
You can think about changing wiz>pyro2 for wiz3 if you don’t want to go summoning all the way to rank 10, but if that’s your intention (maybe necro 3 sorc 3 or shadowmancer if it summons shadows or something) than wiz3 is not worth it.