PoE Lioneye's Fall, Cold builds

Actually played this as Lightning Arrow for the majority of the league. I saw another post on this subreddit using Heatshiver + Immortal Flesh and thought to myself wait, that's like 10x better than Voll's + random Stygian. Went from something like 100m LA + Artillery Ballista DPS to I think 140m, due to heatshiver. Interested in taking the build further, if anyone would like to take a look at my POB and point out any mistakes/gearing upgrades I can make. Kind of unsure how much the 50% inc effect of ailments mastery is helping me, for example.

Gems Needed A1 - Elemental Hit x2, Steelskin, Onslaught, Dash A2 - Trinity x2, Elemental Damage with Attacks x2, Summon Skitterbots, Power Charge on Crit A3 - Grace, Second Wind, Sniper's Mark, Inspiration (Library) x3, Hypothermia (Library) A4 - Chain, Barrage Support, Mark on Hit A6 - Hydrosphere, Elemental Weakness Rush Elemental Equilibirum and Point Blank

The life is lacking, couldn't find a way to bump it higher. Dps-wise looking fine, i guess with such numbers it is possible to freeze non-ubers and maybe it will be benefitial to opt for heatshiver, but then we will need to figure out a proper way to cast hydrosphere and i'm lazy. It is hard to tell budget, but i guess it is possible to get everything for under 20div at the middle of first week. Possible a lot less if you selfcraft some parts. Feel free to suggest possible improvements, i'm not good at building)

hopefully heatshiver doesn't get a rarity increase. made this in like 1 hour and have no idea how to level it lol. you need the 3.21 tree pob

I built this because I wanted to build around fatal flourish and perma-freeze sanctum (Southbound is a little better for freeze and mapping, hotht gloves for dps bosses). I just gambled away most of my currency and failed my no-hit run to a degen that occurred after I killed the sanctum boss floor 2 :( after doing many flawless practice runs... so I'm kind of feeling done with the league but wanted to share.

if you see this VVON