FormerlyHemlock
Hero
Here's the reality, Dave. You sound like you're a pretty good min/maxer. I truly suggest you sit down and min/max a wizard. I mean do like you're doing with Crossbow Expert. Follow the letter of the rule rather than the spirit. You will find the wizard is a nasty bastard with a lot of power, just like old editions. He does way more damage than your wizard is doing. He can convert gold to power better than any class in the game at the moment. As with any edition, the path to wizard power isn't easy or straight-forward, but it's there. You need to build and prepare right to bring the pain.
This. This is the essence of "wizard" to me, whether in D&D or Jim Butcher fantasy or Fred Saberhagen or anything else. (Wizard = "wise, learned".) The wizard relies on foresight and preparation. Any game which supports proactive wizardry is a good game, and while 5E hides it pretty well behind the concentration/action economies, that kind of a wizard is still available in 5E. As I gain more system mastery I get happier with 5E wizardry.
I am a little curious how you get a goristro to bind (research a name + Gate?) but it works okay with elementals too. I've been underestimating Planar Binding I think, because of the material component cost, but you're right, wizards are fantastic at turning gold into a small army of demons/elementals/undead. (Yoink! I have my next villain plot.)