PoE Scion, Nova, Mapping builds

TLDR I'm theorycrafting an Ascendant Shockwave Totem character and don't know how to get a decent amount of damage (let's say 30M), while retaining high levels of tankyness and mobility. Any help or suggestions are welcome. Unoptimized pob: (   Background I like to play allrounders. What I mean by that is that I like to play a build that I can scale up to do all content somewhat comfortably. Speedclearing maps in less than a minute or deleting bosses in 3 seconds doesn't particularly interest me, but I like to be able to do 98% of map mods comfor

Realistically this is 10x tankier than all those "20k EHP INQUISTOR GOD TIER" builds for 2 mirrors! i still see them getting 1 shot through 20k ehp because they don't have enough mitigation. they just have a large pool. SO HERE's my idea. and it works. This is super budget and can be even more budget with most gear if you sacrifice more damage. average is 500k Blight DPS. can go up to a million+ can go down to 250-200k easy to have even more life and mana. And that's fine since all we need to do is stand still and use blight. (this is a afk and right click boss killer not a mapper)