EDIT 3: I have reposted this guide with updates. You can find it HERE

EDIT 2: Since I'm still getting a few comments on it, i'll put the update here - the PoB starter version for Impale Shield Crush is still on, but it has been nerfed quite a bit compared to before. I am still able to hit 1m sirus dps on scraps without when it comes to currency investment and without multistrike, but I don't know how much this can get pushed.

EDIT 1: From the comments I think you guys are right, and that this is something that you can League Start. I plan on making a levelling guide (SSF and Twink versions) along with a breakdown on Unique shields and potential usable weapons during the levelling process through the acts. Thanks everyone for the help, and expect an update/overhaul on this PoB Tuesday or Wednesday depending on when patch notes drop. I'll make another post with a build guide then.

I ended up spending a lot of my previous evening modifying and enhancing the Shield Crush Impale theory provided by u/Spandauer2129, and it looks promising as a league starter. I also used the Shield Crush damage adjustment equation provided by u/ov_oo, which is also cited in the Notes. The damage adjustments are located on the shield. The PoB is listed below.

I made an effort to ensure that I'm not PoB warrioring this by ONLY showing the damage on Sirus with things that are reliably up. The damage gets higher in mapping to around the 2m dps mark. Even higher with a Frenzy Charge gain on hit Body Armour.

Please take a look at the notes, I put a lot of detail into them. I also did a rundown as to why the build works and how we use the mechanics to make things as smooth as possible.

The notes include pretty much everything standard apart from Levelling, Levelling Uniques, and a Levelling tree.

I've also shown a method to craft an easy shield that should be good enough using Essences of Dread. At a bare minimum (which is what the calculations are on), you get 1900 Armour.

https://pastebin.com/4KbLcyR3

Concerns about this starter:

• I do not know if Shield Crush will be good to level with since it's so reliant on the Armour on a shield. My current plan is to use the steel skills for levelling, and then transfer to Shield Crush once I get a good shield to play with. ~1000 Armor for a shield should be enough for early mapping, I think.

• This build does not have a levelling section yet. I am waiting on Patch Notes to see the damage from all the nerfs to see if it's worth committing more than I already have to this build.

• I am unsure on what you would use for your weapon for this build, since all your damage comes from the shield. As listed in the notes, the only good alternatives I could think of are a Prismatic Eclipse (mana leech + global attack speed) and an axe with Intimidate on hit and % increased attack speed after killing a monster. The latter is not included in the PoB.

• I don't know how endgamey the build can get because I didn't factor it in, but just assuming things like Impale Watcher's Eye, GG shield, etc, it should at least be all content viable. This isn't an instaphase boss killer and probably won't be with this style.

I would love any feedback from you guys to make this build better, or to push it to new heights on cheap gear. Apart from the Fettle gems, I would say this is a very easily obtainable build in SSF.