PoE Arcane Guarding, Bow builds

Hello guys! I 've played a Barrage build in a CoC setup with Poet's Pen and Flame Wall before and liked it and I thought I could maybe try something similar, with the difference that Barrage will be my main damaging skill. Made a pob that looks quite promising, Sirus dps is 1.7 million with Enemy Low-Life ticked and by the looks of it, its defenses seem ok, though I could use a second opinion regarding this matter. The build has about 7500 EHP, but no other defenses other than block, Rumi's and Endurance Charge generation which is questionable. I'm using Rote Reinforcement for Endurance Charg