PoE Iron Will, Tempest Shield, Cold, Duration builds

AKA Creepy old man shotgunning with high quality COC. POB: Same concept as Jungroan's Crest of Desire Creeping Frost build last league, but with Dialla's Malefaction, we can go COC instead, for easier gameplay. We are also able to use Divergent Berserk with the new Kaom's gloves, which is just perfect for COC as you get much needed attack speed too. Uptime is decent and ES regen still works to sustain RF. Using Heatshiver for the massive added damage, but shotgunning is not great for ailments so the current configuration is sligh

First time posting a build, looking for critiques on ways to improve it. Tried to use fairly basic gear to simulate. For 3.19. Core ideas, new 40% Mom+eldritch battery to solve mana and add a bit more tankiness and value to dual regen of inq. GMP to shotgun creeping frost. Daressos courage for 55% spell block/75 if blocked attacks recently. Things looking to gear for once it gets going- increased max fire res, get the last couple % left to cap suppression. curse on hit ring to free supports up for RF. Generally adding % increase