Impale Nightblade LL Helix Champion

Hello,

So I really wanted to build around Champion, NB and Perseverance. I thought ele would be too meta and thought that impale with call of steel would feel smooth enough, tried leveling with SH a few leagues ago and it was awful. Though perma Onslaught, Adrenaline and tailwind/new implicit might make it smoother.

I've crafted a bunch of gear and made a pob (first time building one from scratch) but have no idea what is good for SH - aps, avg hit and what not.

https://pastebin.com/39ucVmYS

Obviously I went overboard with the spell suppression in the default tree so in the opt one I can drop a bunch of not so worth it nodes and get either some more life or a second large cluster.

With over 6k life, ailment immunity, 50k evasion and armour and whatever goodies Champ provides I guess the build will be tanky enough. I tried ticking only the perma stuff and not pob-warrior much (I know elusive won't be max effect all the time) and I am getting 220k avg hit with 5.7 aps.

Now the issues, I am always trying to fit more stuff in in builds, anomalus Petrified Blood for once. This lets me run Bloodthirst which is a great support and seems better than crit ones. I am also starved for gem sockets, no movement skill atm and a steel skill gem which was the reason I went phys.

I've currently no annoint so I was thinking I could go Sovereignty and drop the life tap. 85 mana and 47 mark cost every 4 seconds should be manageable. For mapping I guess I can drop the whole mark on hit support and have a steel skill.

I am not looking to do tripple beyond 100% deli mapping but I do wanna juice a bit and do end game content with the build - feared and what not, perhaps try an uber uber boss.

As a first timer building from scratch, never played Helix and not being very popular NB/phys combo I could use some help.

Sorry for the long post.

TL;DR I need help with reviewing the pob and advice if the build is end game viable at all.