Not 11, but 14. No one has canceled the Expert Sorcery skill yet, and everyone wants the Academic skill.

Of course, 11 without Sorcery, I just wanted to emphasize that the strength isn't only in the "Ory" skill. But it's not 14 either, because Sorcery only increases effective initiative by a factor of
(10/7) within the limit of an infinite number of casts. In the case of two casts, and it's definitely not worth counting on more (if there are more, that's great, death to the enemy), the effective initiative is equal to (Ory level 20) (22/1.7) = 12.94 < 14. Don't forget about this.

Because Golemageddon + fighting to the last is a great evil (tested yesterday)

It is evil. You can only effectively counter it with an Elf and a Demon, if you have Apsukubs that can chain-fire and quickly deal with units with low HP. And also with an Orc, before they nerfed the ability to reduce rage into negative values when absorbing damage.

I think you can simply reduce the duration of Stalkers' invisibility to 2 turns.

Even with Lethos, this might still be too much, although I can't say for sure. But 2 turns is definitely closer to the truth than 3.