Does wiz 3 have any synergy with summoner classes? i dont know much, but it seems like quick cast wont give more damage to ur summons (need to check). If summons benefit from quick cast in someway, i would probably go with option 3.
If wiz 3 doesnt āworkā, I think i would go with the first option (not sure what wiz c2 brings to the table in this case), so u would have some DPS classes to go through the game before reaching sorc-necro. Linker 2 Is awesome for summoners as u link up to 8 mobs and share the damage dealt by ur summons (and u also have spiritual chain), so linker c1 may be not enough specially after the nerfs (almost no CC duration with HK).