[HC] Terminus flicker theory - review needed

Hey. I wanted to share a flicker strike build i'm currently leveling on HCSSFBTW, and would like some criticism & suggestions. Basically, i wanted a build that:

1) HC viable
2) as solid and reliable as swiss clocks
3) doesn't rely on hardly obtainable items 100ex each
4) doesn't get one-shot by reflect (yeah i know the only reason it won't die this way is it's inferior DPS output, but still)

I've chosen path of champion for it's free fortify and additional 5% damage reduction and path of asassin for additional crit chance.

So, at level 90 the numbers are:
- 7000 life
- ~70% effective crit chance without diamond flask, 85% with it
- 267k DPS vs trash without ancestral protector
- 330k boss DPS with flasks up, 221k without
- 298k guardian/shaper DPS with flasks up, 205k without

At level 100:
- 7700 life
- 361k DPS vs trash without AP
- 442k boss DPS with flasks up, 300k without
- 407k guardian/shaper DPS with flasks up, 276k without

Flasks: TOH, Atziri, diamond, basalt, life (grounding+heat+staunching)
I use TOH flask instead of lion's roar for additional survivability, with Lion's Roar the DPS numbers would be slightly better.

Uniques: rat's nest/starkonja's, kaom's heart, shaper's touch or rare gloves, choir/voice of the storm or a good rare amulet with crit chance (maybe
will replace with defensive rare or bisco if i can raise crit chance)

Pantheon: Brine to avoid stunlocks / Yugul for reflect

POB link, for those interested:
https://pastebin.com/mkfh1P9w
Online lvl 100 tree:
www.poeurl.com/bBD9