Preferably offline and not very hardware demanding (I can’t seem to run anything Unreal Engine 4).
D2R as necromancer?
Torchlight 2, as either an Engineer with mechanical minions or an Outlander with shadowlings.
Zelda: Echoes of Wisdom. It’s almost all summoning.
Also, can’t Guild Wars 1 be played offline? The Necromancer in that is all about minioning
GW1 is online only, though the game works well as a solo experience. The minion master in that game is my fav by far.
it’s also having a 20th anniversary event right now so there’s way more people online than usual, for whatever that’s worth
maybe you’ll find some friendly people to party up and collect minion skills and make a goofy number of minions
Its fun having minions that are slowly dying, and seeing how many you can manage to collect before they all croak