Need advice regarding sunder build..

I deal about 330k tooltip dps , have 100% impale chance , Comfortably killing tier 14-15 monsters,but some of the bosses die too slowly..

I generate power charges with stuns with passive skill , and i use 2hand mace.
I use kaom armor.
Should i change to some expensive armor with frenzy charges on hit?

Im crit build have 70% crit chance and 500% crit multy.

My gems can be upgraged to awakened and i can put 2 more jewels in the tree or 1 timeless +1 crit jewel..

The links i use are- Sunder,pulverise,melee phis,brutality,crit chance and crit multy.

Im slayer.

I've got one for you that maybe you aren't doing and some bigbrain mentioned to me in passing on reddit, use hydrosphere on bosses and it will cause a shockwave hit on your real target so you can frontload an extra 80% or w/e of your damage.

Maces aren't great either, especially for crit you are almost certainly better going axe and trying to get a solid fleshripper together.

Frenzies are definitely better than power charges so i'd find a way to generate them reliably, lots of players do the eldritch implicit on body armour and get charge duration to ensure they never drop.

Don't forget warchief totems, 4 link warchief has to supplement like every melee build for some reason known only to GGG, you could even 6l if you had double 6l available.