It still needs to be leveled up.

Of course, the trainer needs to be leveled up,
and you can get +1000 experience in the Dungeon, and there is also a Stone of Knowledge nearby, and this is certainly not all the possibilities.

How is it 17 if it's 16?

The angel's base speed: +12, Artifact: +1, Acceleration: +4.
Total: 17.

Plus, mana will double with 6 less knowledge (from level, armor, and crown), which is quite sad.

But we haven't canceled intelligence, it needs to be leveled up.
Also, visit Utopia, increase the parameters,
including knowledge, don't forget :)

Besides, if there is no air, you lose attack from accuracy.

And again, Utopia is a great answer to increasing attack from accuracy.

I won with 70 snipers and not much reserve, and on day 7 there were 50 of them.

But this is a really more serious question.
But intelligence + the power of knowledge, I think, will do the trick.

Learn Blessing...

I haven't found Blessing on the map, but you can learn it from Adela.

And, of course, you can argue for a long time,
what to say - you need to try to complete it.