MagiQuest Topper

Trying to create a wand topper for a live action gamed called MagiQuest. This piece will screw into the end of a game controller that's shaped like a wand. I've cobbled this together using Thing 3569743 on thingiverse (the egg shape), the Relic Scepter from Forge Studio on cgtrade (royalty free licence, paid), and some bolts I got some time ago and don't know where I got them from.
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The bolt part is at least properly to scale; printed to test. But I'm seeking a little bit of help. I am in no way an experienced 3D sculptor but I have a feeling a few things are just...off with this. Firstly, Meshmixer is rendering this really super smooth yet when I import it into ZSuite to go and print it's super low poly. While I don't mind the angles -makes it look kind of like crystal which is cool- it's also messing with the egg. I don't know how to use Blender, of if that would even fix anything that might be going on.
I'm also seeing in my slicing program that the middle spire on this is a