Can anyone help a newbie with some build problems

I'm just about to finish the main story and head into the end game stuff. I just wanted some build help, I equipped cast when damage taken on my helm, I added war banner, frost bomb and vortex but they never seem to trigger they're both lower level than the gem says they need to be. Any ideas what I am doing wrong?

Also any recommendations on some basics, I use leap slam and then ground slam but also have frenzy, what gems are good for frenzy? I dual wield, I'm not too bothered about meta builds just some fun stuff to use

your profile is private so we cannot see what is happening/review it

typically you want to focus on 1 skill (ground slam) and use everything to buff that entirely.