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If you believe this is totally unrelated, we can ask the powers that be to move this to another forum.
I thought it related to the subject of Magician versatility and changing Base Lists.
Maybe I read it in EssCo..(?), there is a good chance I misunderstood it too.
Although SOHK states that you can't Specialize in Spell Lists, let's say "you can".
Now if you Spec in one of your Base Lists, then for the DP spent for 1 Rank, you develop 2.
Pure Casters 3/3/3 = 1Rank/1Rank/1Rank
Spec Base List 3/3/3 = 2Ranks/2Ranks/2Ranks
So 6 Ranks in one Base List/level is darn powerful! The caveat is that ALL other Base Lists are now Restricted (!)
If you Specialize in one Own Realm Open List, then all other Own Realm Open Lists are Restricted. The same applies if you Spec in one Own Realm Closed (my favorite so far). IIRC, you can't Spec in a Other Realm or Other Profession List.
You have to make sure that you track the DP's more closely; if you jump from one cost 4/4/4 to 6/6/6 or 8/8/8, for example.
This will create the potential for extremely powerful casters in one List, while greatly retarding advancement in others. Having ~18 Ranks in Fire Law at 3rd Level is pretty cool, but you could only have a handful of Ranks in all other Base Lists, at best.