UPDATE: So after some testing, reduced flask charges used on tree (and enchant) works, but the inc. flask charges used on dying sun/vinktar/taste of hate don't apply. This makes flask sustain, even when using the flasks, a lot better. Furthermore, it shotguns! At point blank, you can get any number of projectiles to overlap, so GMP is our best link for single target and clear. As far as I can tell this build definitely has potential

A lot of discussion concerning the new skill, but I haven't seen many PoB's yet so I figured I'd take a crack at it: https://pastebin.com/ssWjZKJQ

Some highlights: -170% inc. charges gain for Nature's Boon and Master Surgeon. That's around 12 flasks per second, up to 15 if you use storm brand to get closer to Master Surgeon's cooldown. Here I'm a bit worried since to using the flasks on cd and spamming EC consumes around 27 charges per second. If it's really a problem I'll have to fit in Overflowing Chalice which brings it to 29 charges per second with storm brand. My secret hope is that GGG overlooked automatic flasks with the micro-distillery belt, i.e. it will still trigger automatically and I get to keep the 20% inc. flask effect (though this is unlikely tbh...) -101% inc. flask effect to squeeze out an extra projectile from Dying Sun. -5 projectiles without LMP and GMP and 80% inc. aoe. I'll slot in one or the other depending on how much overlap I'm getting, LMP is 32% more multiplier and GMP is 33%. Awakened GMP is 48% more theoretical damage though I'm not confident all 10 projectiles would overlap. -90%+ crit chance with 400% multi, though granted this is with inc. critical strike support. I will have to play around in PoB to see if it's all worth it. Worst case we still path near generic damage nodes so it's not difficult to respec out of crit if it's too much investment. -Evasion dodge and avoidance as mitigation. Not elemental ailment immune but they'll be removed with flask use. Using mistwall generally but I plan on having an atziri's reflection in weapon swap for cursed maps.

Would love to get feedback and ways to iterate and improve! My leveling plan is to start with explosive trap, and transition to EC as soon as I get Nature's Boon and the required flasks. My backup if the skill doesn't work would be an explosive trap raider which paths similarly enough.

EDIT: updated PoB https://pastebin.com/qyMq5vp0 taking into account all the feedback gathered. Thanks!