I am unclear about how Spell Mastery affects MuVi metamagics. With particular notice of Multi-casting.
It is uncertain how much latitude there is in the default 5th Ed spell descriptions when it comes to mastering spells. Since there doesn't seem to be a prevailing belief on these forums that the optimal magus build is a MuVi specialist with Mastery, I am going to assume that the most munchkin interpretations are not upheld by the group consensus.
Still, what happens in you master Wizard's Communion with Multi-cast? The default spell description states "All the Magi in the gathering who know Wizard's Communion add the level at which they know it to get the effective level of the Wizard's Communion." and "...the target number for the spellcasting roll is the spell's level divided by the number of magi participating in the Communion..."
So can Multicasting be used here?
I see 3 possible interpretations:
- Each multicast counts as a separate mage participating - hence a MuVi multi-cast expert could easily cast and/or strongly Penetrate other formulaic spells with the target number reduction they could give themselves by solo boosting.
- Each multicast adds to the effective Communion level, but only counts as 1 mage participating - hence the MuVi multi-cast expert couldn't solo boost his own casting.
- Multi-casting can't get past the wording of the spell, and you are a single mage contributing a single boost to the effective level. Though you could probably be simultaneously part of two different groups using Wizard's Communion.
Then there is weirdness when you use Sorcerer's Fork and multicast Wizard's Boost on the resulting two spells. Or would it be better to Wizard's Boost the original spell before applying Sorcerer's Fork?