I know this is an older post, but Ill try to help... A few questions... why put chance to stun on your weapons? Wouldnt adding pure damage percentage help more? Or is that to try to increase survivability slightly? Why Pain Enhancer rather than Trapped? You have to get right in up close anyway so why not take the 100% guaranteed damage increase vs the 26.5% chance to critical hit? You basically have a 1:4 chance of getting PE to proc, where if you used BoT, you would get a nice damage buff all the time.
This is my WW build. I managed to solo GR70 with it. https://us.battle.net/d3/en/profile/Devestator-1333/hero/50143225 It's not perfect by any means, but I did manage to muscle my way through 70. I know unity has fallen out of favor, but I like having the extra CHD and CHC along with the damage mitigation. The play style for me is keeping WotB up as much as possible via the Obsidian and only using WC and BR at the moment they run out so all my Obsidian cooldowns go straight to WotB. It's not perma 'zerk, but it's close. I also only use Ground Stomp in huge hordes of enemies so I can suck them all in and rack up Crits to proc Bloodbath. That splash damage adds up quick. And dont count out Rend on an elite or rift guardian. Doing triple damage while WW'ing is a big damage increase.
Im actually debating swapping out Stricken with Pain Enhancer. I would have a 41% chance to proc it and unleash 5000% damage vs the 1% increase per hit, which takes quite a while to add up to anything significant.