Trait conflict , pummel and heart seeker

my team is comprised of
inox apocolaps
traits , naxor harbinger , urh harbinger and artifact trait is second wind

ebony ent
traits , natures blessing , nutrient blood and artifact trait is benefic

dusk crusader
traits, amalgamy , heartseeker ,artifact trait is pummel

chaos guard
traits , vigor , song of resolve, artifact trait is pride

stardust amaranth
traits, exalted detriment , jailbreak ,artifact trait is none

nexus amaranth
traits ,collective unconscious , dreams of ice , artifact trait is none

when the dusk crusader has the artifact with pummel equipped it only does one attack at the 15% of the his attack when i remove it it does swing twice and with heartseeker at full then a second time at the 35% buff