The limit of one summon per character ruins the necromancy subclass, as well as any other class or subclass that should be able to have more than one summon out at a time.
I might have missed something, but what makes you think summons is limited for 1 per character?
my wizard has his familiar summoned along with zombie from wand you get from the hag which indicted there is no limit
By the way if there is a limit +1 for removing it i love having multiple summons, and games like NWN that only gave you one really bugged me
