PoE Cold, Duration, Bossing builds with custom stat filters

Feel like I hit a brick wall with this build, I got it to be pretty tanky and I can even survive t16 whisped maps and tank through some crazy mobs, but my DPS feels lacking. POB Linked below, looking for suggestions on how to take it farther from here. Have about 30-40 Div liquiid for upgrades, but I feel like itll take more than that to pump the damage up. Getting all charges beyond 11 seems prohibitively expensive. Is this just sort of the nature of this build, am I missing something super obvious? Considering re-rolling at this point for something w poison to clear juiced t16s and maybe

PoB: Currently have around 30-35 divs to upgrade, just not sure where to go from here, shield and ring maybe, but idk. Also is this good enough for ubers, or is it better to just spend the divs to reroll to some boss killer?

Leveling Tips Act 1 - 5 Rush Elemental Overload on skill tree, if needed pick up Health Mana nodes on right side of witch starter area, i go for life on top right first then branch left to templar area. Buy Minion damage / Infernal Legion support in Act1. Socket in Summon Skitterbots in Act 2. Also optional to level Spiritual Aid during leveling to boost both your and skitter DPS then respec out of it later. On lvl 28 equip 4L Vortex + Deadly Ailments + Cold to Fire + Ignite Prolif

Hello all, I got into a POB/theory crafting mood and got a lot of good advice from the last thread. Some good tips there still too. Even though I vowed to stop spending currency on this build, it was too much fun to continue theory crafting and pushing the build. Total cost probably around 100 divs now. But it's pretty much min-maxed imo. Final POB (for me): [htt