Frenzy Stacking Frost Blades Raider - Looking for suggestions for pathing and DPS improvements

Here is my build with the gear my character currently has.

This is my first attempt at a build made without a guide as a reference so I'd love any feedback. The basic idea is to stack frenzy charges so I started with raider and then went for as many sources of max frenzy charge as possible. Ice bite looked like a good choice of support gem due to the frenzy charge scaling and I chose frost blades as a result. I'm aware that it's not a particularly good skill for bossing so my goal is to get around 2-3m DPS to clear moderately juiced T16s.

A note about the gearing: the gear is the gear my character is currently wearing so assume that as a base for any potential upgrades. I'm aware there's still a good bit of progress to make (specifically with chaos res) but I wanted to make sure all of the necessities were covered first.

Notes on defense: ziz taught me that any character with grace, determination, defiance banner, and spell suppression is tanky enough. I wasn't able to fit the defiance banner but that doesn't feel like too much of a loss to me. I could be convinced otherwise but the extra reservation needed costs a lot of points. On top of that, I also chill, freeze (although I'm not certain how reliable this is on bosses/high health mobs), maim, blind, leech, gain life on hit, have elusive, stack quite a good bit of evasion via the frenzy stacking, have chill and freeze immunity, have +1 max res (and would like to get an additional +2 from the chest implicit), and run a cast when damage taken molten shell. I know the life is pretty low but I still have some points I'll get from leveling and I'm strongly considering putting them towards life. I also consider the high additional movement speed to be a reasonable defensive layer and the QOL feels amazing as well. Also not sure at all what I should use for my pantheons.

A note about the fortify on the chest: stumbled upon that by accident. If the fortify is reliable on bosses/high health mobs, it seems very worth it. I've been running T12s and it procs reliably but I recall hearing something about fortify being hard to maintain at max stacks in high tier content so if it's not worth it, I'd swap it to hatred aura effect.

Notes on offense: I know awakened gems would help but I don't want to spend all that currency yet unless it is the most efficient use of it. I don't have enough mana unreserved right now to cast the lightning golem so I'm not sure if it fits either. If not, I'm not sure what gem should take its place. I cull with my second frost blades but I'm not sure how to show that in the POB. I'm pretty sure the selection of support gems (minus the lack of awakened-ness) is the most efficient group based on my looking at other frost blades POBs on poe.ninja.

Regarding mana: I use an enduring flask to maintain my mana. If I could swap that flask for a silver flask, I would gain a lot of dps (and very much appreciate the additional movement speed as well). Is there a good way to find another source of mana regen?

Other than that, any advice on how to free up any additional points or get some extra DPS without compromising on the defensive layers would be much appreciated, especially anything glaring that I might have missed.