Finishing Boneshatter Juggernaut Mace Craft

With some persistence and luck, I've reached a Piledriver mace for Boneshatter Jugg with Essence flat phys, T1 percent Phys, and T1 bleeding suffix. Only other affix is a useless lightning damage prefix.
For now I've just crafted Attack Speed on it.

My options I'm considering are:

1. Slam Warlord Exalt for any of 3 great suffix options (Culling Strike, Melee Range, Additional % Phys)
2. Lock Prefixes, Scour Suffixes, Multimod Speed and 10% to Double Damage

With the first option, I get a little variance but a solid upgrade. With the second, I get a better overall DPS (but have to take 1 bleed node in tree).

However I'm concerned that the double damage might cause a spike in Boneshatter's actual damage dealt to me. When I approach my max stacks, I'm hitting myself for about 1K per swing. If that has a chance to double, I could easily kill myself.

Do we know if double damage proc on Boneshatter can happen to the player? Also, are there other options to consider for finishing the craft, which I'm missing?

PoB: https://pobb.in/ciROpb0_pP9B and note this is a private league, so resources are limited.