Question about building a tanker fighter

[NotMyWay]

Hello, i was thinking about making a tanker but i have some questions about the builds.

firstly, if i place every single point into END, would i lack damage and thus become ineffective at holding aggro? if so, should i empower mock cooldown time, or add 25 spr (increase damage by increasing crit, and also increase m.def and max sp)?

secondly is about the skill empowerment. im not sure what would be good, but im considering devastate duration, and maybe the cooldown/duration of the stuns. would that be a good idea? any suggestions?

thank you for your help.