Shift Fire Golem from Necr to Fire Sorc. The Fire Golem is aesthetically poorly suited to a Necromancer and was designed in a savage time. Give him another golem. With Golem and Hydras Fire Sorc will get a new build option.
Some kind of suffix or affix for minions on items would be nice. All pure summoners should also have the option to direct minion aggression like Warlock do. Well, maybe except for the Fire Sorcerer.
Pure Warlock summoner is strange: when Binded demon is super strong, other literally can’t compare. Only Taited is useful bc of his fire resist aura. The Defiler casts so slowly that all enemies die before he even sanctifies a couple of them. The three-demons limit stifles gameplay. Clearing speed is terrible, regular demons can’t really leverage each other’s strengths and are mostly only good for absorption.