
Strix |

I've been trying to find some clarification on this ability, but all the posts seem to be about whether non-wizards can take spell mastery.
I'm trying to find out how superior spell mastery (from the Magaambyan Arcanist PrC) works re taking the feat multiple times and lowering the power of the feat when using the ability to reselect mastered spells.
Firstly, if I take the feat as a level 5 wizard w/18 int, I can choose 4 spells I know that I no longer need to use a spellbook to prepare. If I then become a Magaambyan Arcanist and, at level 7 (Wiz5/MA2) I get superior spell mastery and use that to reselect spells, by RAW:
"choose a number of spells she knows up to her Intelligence modifier, which have a maximum combined spell level total equal to or less than her caster level, to be her Spell Mastery spells in place of the same number of spells she previously selected for her Spell Mastery feat."
So, by using "superior" spell mastery, I will more than likely end up with fewer spells than I had before re-preparing. Is this correct? If I have a 1st, a 2nd and 2 3rd level spells mastered initially (at level 5), re-preparing means that the most I can do is have one 1st level spell and 2 3rd level spells. (at level 7)
This seems to weaken an already weak feat because of the "versatility" it could add (remember that there's a 24-hour in-game study time required to use this, with which you could be making items and such). In my experience, versatility doesn't come close to specialization in terms of the power it can give a character. (Mystic Theurge being a case in point) Basically, power is throwing out a Quickened, Persistent, Piercing Baleful Polymorph at DC40 multiple times in combat. Versatility is remembering to cast teleport before that happens.
As a 13th level wizard (say, Int 20), one could take this feat for 5 7th level spells (a total of 35 spell levels) and, upon remastery, this drops to 13 spell levels (about half the original). How is this drop in the overall power of the feat justified by the versatility one could get?
Then, reading the wording again, it seems as though it doesn't cater for the fact that a caster (wizard or otherwise, depending on the ruling) can take this feat multiple times. The rules use the singular "feat" and don't handle what could happen if you take spell mastery multiple times or later on in your career.
Do you keep separate lists of mastered spells and have to relearn them in a set group each time? Can you pick new spells in place of mastered ones as long as the total spell level of mastered spells doesn't go over (CL)*(no. of times SM was taken)? Or does "superior" spell mastery replace all mastered spells with, at most, a set whose levels don't exceed your CL?
Sorry if this sounds whiny, I'm just really keen to play one of these and I want to know how the abilities are meant to work.