The poor cold Apostate grows stronger still. A few more patches like 1.2, and the build will actually become good. Credit to @Nery for creating original concept, big thanks to @tqFan and @lMarcusl for help with troubleshooting.
GT link: Apostate, Level 100 (GD 1.2.0.2) - Grim Dawn Build Calculator
Build update: replaced Mythical arcane harmony leggings with different green pants. Rearranged skillpoints for improved QoL.
Playstile:
Standard Inquisitor channeler. Stand in the Seal channeling Drain Essence, cast Rune of Hagarrad on CD, refresh Siphon Souls on enemies as it expires. If you need to move, make sure you can recast the Seal on arrival.
Features:
Relatively tanky - combination of seal, DE leech, MoT and couple defensive debuffs give you a decent survivability, allowing to completely facetank individual bosses and sunder up to the SR80. Keep in mind, however, that said tankiness relies on always standing in seal, and actively debuffing enemies with 2 very short range skills, making the setup completely crumble in high SR.
Terrible AOE - DE is the worst beam skill in the game, and this build is capped at attacking no more than 7 enemies at the same time with it. This makes the build struggle with big hero packs more and more the higher it climbs in SR. RoH doesn’t help either, its delayed activation and terrible pattern making it wildly unreliable. In Crucible it suffers less, but gets no awards there either.
Low damage - single target damage isn’t great, and cold-resistant nemeses are a particular struggle. The build is held back by lack of itemization for apostate, and DE and RoH in general being bad skills even with recent buffs.
Itemization:
Nightshard - can be replaced with Mythical Speaker for the Dead for bigger cold resistance shred. I highly advise against that, as Ill Omen creates absolutely uncontrollable pulls in SR, making build’s struggle with big packs much, MUCH worse.
Those greens - they don’t matter, any legendary cold pants/boots will do in their place. Even fantasy greens don’t make build’s struggles any better.
1.2 endgame performance:
SR:
SR 81 with several deaths. It can be cleared deathless, but requires caution, as hero ganks start to pose threat. Most bosses can still be facetanked through the sunder with careful use of MoT, with notable exception of Shattered Outcast. Anything below SR80 is a slow, but stable clear in full facetank mode.
SR 85 can not be cleared deathless no matter what, and demands precise execution of sunder mechanics. It also completely stops being fun, with Moosa and Kuba taking a fucking eternity to kill. Build still is capable of certain facetanking feats here, like with Valdaraan or Reaper, but hero packs, Moosa and Fabius become completely unreliable, making SR85 the end of the road for the build.
Crucible:
Full buffs with extra spawn, at 7.54. Requires careful piloting, but can be done consistently.
Full buffs without extra spawn at 6.59. Generally uneventful.