I’ve been working on some homebrew for a mystic theurge style wizard. I was wondering if this seemed balanced to you guys.
Sublimation School
You have studied the magics outside of the scope of wizardry and have picked up skills and secrets to use them more effectively.
You learn the Arcane Sublimation School Spell
If you take the feat advanced School Spell you Gain Arcane Rearrangement
Arcane Sublimation Focus 1
Cast 1 action verbal
Duration until the end of your turn
You use your expertise at wizardy to aid in the effectiveness of casting a spell of another tradition.
The next time you would cast a spell you may substitute your Arcane spell DCs and Arcane Spell Attack for those the spell would otherwise use.
Arcane Rearrangement Focus 4
Cast as you are preparing your spells for the day
Duration until the next time you make your daily preparations
You may spend up to 3 focus points while casting this spell. For each focus point you spend, you may choose any spell that you know and prepare a single casting of it as if it was in your spellbook. The spell is treated as an arcane spell in every way, but you may not copy it into your wizards spellbook. Each spell prepared this way lowers your max focus pool by 1 until it is cast.
This does not increase the number of spells you may prepare in a day.
Broadened Magics Thesis
Choose a multiclass archetype that has a basic, expert, and master spellcasting feat. You gain that archetype's dedication feat as a bonus feat even though you don't meet its level prerequisite, though you must meet its other prerequisites.
You can choose the spellcasting ability score for the multiclass archetype you chose as your key ability score.
The cost of using Arcane Rearrangement seems too steep to me.
Lowering your max focus pool seems like too much.
I think it would be enough to spend the initial focus points to prepare the spell(s). And then maybe also having to spend a focus point to cast the spell from the prepared slot. In that way the spell is both treated as an arcane spell and a focus spell simultaneously.