opinion on mythic build for WOTR

So for context, I was building an overrun build for the wrath of the righteous campaign. I was a fighter molthuni defender and for several reasons (them being I felt the party was getting annoyed and not being able to fully utilize the build) I decided to change my build. The GM allowed me to (someone that thought I should as well) so I decided to go a vital strike mutation warrior build. I was changing mythic feats and abilities to better fit.

the feats I have so far are level 11 (mind you we are using elephant in the room) https://imgur.com/a/roL1AYx

Mythic abilities I have are blowback, impossible speed, and titan rage (not counting the ones I get naturally for being mythic). The part I need an opinion on is whether should I replace titan rage. As it stands now I either have to use a standard to use titan rage, use 2 mythic power to use it, or preemptively use titan rage. I was thinking of replacing it with extra mythic feat (most likely mythic power attack or weapon spec), enhanced ability (either strength giving me 28 or con giving me 22), or possibly fearless or pure destiny.

edit: I am using an eartbreaker, as it stands right now I don't know the enchantments because DM said he would give me one when the session starts.