When I run WAR in WP and AK I take Defiance off and switch to DPS accessories for bosses. Definitely doable and you'll put out far more DPS than a PLD in Sword Oath and the same gear. You'll be pretty low health unfortunately (I have 4800 in full darklight/bravura/STR accessories) but it shouldn't be anything a half attentive healer can't manage particularly when Psycheflayer and Demon Wall do almost no damage in AK, and the Flan in WP literally does do no damage. For the Tonberry I toggle Defiance back on and pop Thrill of Battle before a 4-5 stack Grudge.

Threat hasn't been an issue even over a BRD in mostly i90 gear.

Wouldn't recommend for main tanking primals or coil.