MA has been kind of untouched for a while, which I don't know if I should read into too deeply.
As far as I can tell, currently at high-level play, MA is basically a "piety-farm" god. Aside from mana leak strategies (which is VERY map-dependent), after you gathered piety you switch her to a god that actually has good boons to buy.
I'm not particularly someone who goes for mana leak strategies often so I'll leave that to someone else and I'm only going to talk about one particular boon: Magic.
Magic raises your maximum MP by one, and raises both enemies resistances. According to the description, MA doesn't like fighting and wants to instead encourage the use of "utility" glyphs.
Thinking about it, this doesn't quite work. What do you usually use higher MP max for? To "burst" damage enemies like bandits and wraiths without going into melee so that they won't be able to mana burn you (to a lesser extent you can also burst damage glass cannon bosses like Aequitas). The resistance increases on enemies basically goes against this purpose. Of course, this isn't completely accurate, because sometimes the 1 mana can push you from casting 3 fireballs to casting 4 fireballs and killing an enemy even with the increased resistances, for example, but in general over the long run it's counterproductive.
Now, let's talk about what the "intended" use of the Magic boon (under my interpretation anyway) is if you read the lore: Casting Non-combat utility glyphs.
Here's the thing though: Non-combat glyphs absolutely does not care about maximum MP! Unless you don't have the mana to even cast the glyph once (probably because you are doing some weird Trog switching hijinks or you're a transmuter), max MP does nothing for say, helping you break walls faster when worshipping Binlor, because you'll always regenerate the same 1MP per square no matter what your max MP is.
All it cares about is MP regeneration really, which is basically why BludToPowa just about the only support for those glyphs.
In theory, raising your maximum MP means better gains for potion use and something like GG's protection boon, but no one would blow those resources for non-combat purposes like breaking walls unless they're really desperate (e.g they just got stuck behind some barbed vines).
Ironically this makes Dracul the REAL caster god, because he gives you 2 MP per boon, no questions asked.
So yeah, anyone who's more experienced at MA, maybe you can point out something I'm missing, otherwise, there's something I wanted to type for a while.