Depends. Different pets have different AI levels. Spectres are arguably the "smartest" pet class. Solar Guards will fucking play the game for you. I've run a Spectre Necro with every league except this last one. They're amazing. Convocation gets reduced by Necro ascendancy and with the quality CDR on it now, it's pretty manageable. You can do it like every 4.4 seconds or something without CDR on gear or something. With the new enchant changes you could get Convo Cooldown reduction on your Bone Helmet too.
Endless Hunger unique jewel + spectres make mapping/delving too easy. They also keep adding little buffs to minions that spectres benefit from such as just a shit ton more damage with Spiritual Aid nodes and the Soulwrest staff is pretty nice if you're not going tanky. I ran a Soulwrest for lulzy clear speed and could clear an entire T14+ map in less than 2 minutes, boss included. When I started delving I wanted to get tankier so I just got a shield and a Sai I Bound fossil crafted with +80% minion damage on it. I got to something like 65/65 block chance and 2 curses on my necro with 6500hp and MoM.
Golems are good dmg potential, but retarded. Skeletons are the same. Zombies are mostly for meatshields. SRS are heat seeking missiles so they're better than the others, but they can't take hits for you. Spectres are truly in the sweet spot for summoners if you want an army. And you can generally run with multiple zombies/skeletons to accompany your 3-4 Specs.
Was thinking of playing an ice golemancer next league. Maybe instead I’ll do the solars. Just don’t want the pain in the ass to resummon them if I die. Which is often because I derp this game.