Cestra Incarnon

Anyone know of any good ways to proc Steadfast Grit for that 3x crit multiplier? Like a constant amount of uptime to keep shield/overguard gating, maybe even perhaps on command. Parasitic armor might be a good way but that completely removes gating. Tried with Harrow but sometimes shields dont completely trigger gate. Lookin pretty juicy w/ +40x crit multiplier on incarnon mode. Would like to see what it could do with Acuity