Golem skill gems

I'm missing golems from D2, but I think there is a problem to have many summoning skill gems in POE. Since in PoE players choices isn't limited and players can have as many skills, as many socets they gear can have, they can simply spam summons.
So my suggestion to add different golem skill gems (blood, metal, glay etc) and add skill passive that allows to use different type of golem or slightly increases it effectivness or add restriction that players can have only one golem type summoned at one time to prevent summoning spaming.