So what type of creatures do you guys think would be awesome to summon, lets say that your caster level is 30, and i want to control them. so creatures with HD under 30.
I think the highest CR nonspecific creature you can call and expect to control is a CR 24(Titan, Hekatonkhieres). Many of them are good to control. It depends on what you want to do. Solars cast as clerics so that is a lot of spells to have access to.
the spell is coming from the artifact, Manuel of infinite planes, so he wouldn't have alot of other spells.
he would want to secretly play with a party and eventually defeat them in a grand way.