One thing to note for evasion.
Player Evasion - Enemy Accuracy
Evasion % = ------------------------------------------------------
(0.3605 * Player Level + 18.64) * Enemy level ^ 0.335
With a maximum evasion rate of 80~85%
This is fairly accurate, and if you would like to look at it more refer to this https://github.com/vyne1/tos-mechanics/blob/master/ToS%20Mechanics.pdf
You need roughly 1100 evasion to have maximum evasion for pve at level 280.