mmm, iīm starting to understand your point, after doing some numbers itīs true that her extra AP is not comparable with other leaders abilities, and other fact, she is the cheapest leader which a potential 7 base attack... maybe she is slightly underpriced, an extra +5 levels could balance her a bit more.
Well, as Saga 3 shows some support can be pretty good in melee as well. Also, to be honest, this sneak attacks are not THAT great. Average sneak attack is around 8/8. Great, but I can just spam Theurgias who will throw 9/6 attacks every round because as a DR they need no to dodge at all.
Sneak attacks are usually pretty good and the prowlers very cheap (40-45 levels), harod's is 10/9 with poison, eve's is an 11/4 with seal, Momiji`s is 11/5 with 2 dices, others prowlers more usefull out of this role have worse sneak attacks (like kyler, Jerome or Vero), the problem is the excesive amount of time to be ready to do it again. To find spammeable attacks with this aproximately power we have to go to more expensive models like chesire or Theurgia (50+).
We cannot make the sneak attacks as spameable as the warriorīs because itīd be OP but it actually needs a buff. I think with the hide in CZ mechanic is good because the sneak attacks are still expensive (oooo) and if you want to try to hide in CZs to reduce the lag (from O+O+OO+O+O+OO to OO+OO or O+OO+OO) you have a chance to fail so itīs risky (and drain gnosis), so it adds versatility but not for free, it still have a price.
We can consider that Kudoi and his court mantis (13/4) like an sneak attack, it is expensive but very powerful too, it is in a cheaper prowler and itīs hard to spamm, the idea would be to try to match the sneak attacks to this. Court mantis is expensive but at least every 2 turn you should be able to do it, you cannot do that with sneak attacks unless you recive heavy suport (but the hide mechanic have the advantage of makes you less vulnerable so it should have a price), if court mantis would cost OOOOO and kudoi would recive slow level 2 when he uses it the attack wasnīt so good.