Discordance is basically really powerful (my arena build deals 200k DPS ATM incomplete despite low CD without dmg reduction and with dmg reduction, less dmg but still high DPS).
In my campaign build, my Chakram Discordance reactor build I can spam with 45% reduced CD and deal insane dmg from frozen, Arcanist+ ascendant. It's very successful despite some handicaps as I can also use relentless , mutilate , dextrous, deadeye. I dealt up to a quintillion dmg already through frozen and I guess I could reach floor 1400 without crushing blow (I will have to find out). can also work with devilpillar idea, shocks, poison, anything.
The orb will have 300% Dmg from chakram. 4 multi attack is usually 3× dmg but with mutilate 20, this means 3.6× more dmg. 300% turns to 1080%. With push the limit this 1080% turns into 1620% dmg per 0.1 seconds (reactor is 1620% every second ). I can also use living force and the all skills affix to boost it as well as possible cosmic power + timewarp or identity set affix. I calculated that I can get more dmg than wizard despite many costs. I had this theory ages ago but I never thought it would be successful and I wanted to try an idea most wouldn't try due to CD. I can also spam that orb many times.
People also use Discordance for repeated high Dmg blinkstrikes if done correctly which is definitely possible. Discordance was OP with the LOKHO build because it made a single arrow up to 2000% MH dmg or more thanks to skilled, multi attack, guided shot swap even if arrow CD is Equivalent to Guidedshot. Back then, arrow had long range too so easy instant kill, high bleed and fire for back in patch 2.0 (nerfed since 2.1). Also skilled mythic.
Spamming high Dmg twisters is also great with Discordance. You can have twister with primary CD which can be below 1 second, spam it. If you use gauntlet with 150% dmg from blast, twister deal 150%. This turns to 300% with hero points. If you use 4× multi attack, 300% × 3 = 900% dmg twister. 900% dmg per 0.25 secs or less is cool. Then you can add push the limit, cosmic power with timewarp, living force, nything. I could get up to 3000% dmg per 0.25 secs and spam twisters. Op combos. Proc build with Discordance coming.
Flintlocks I could use for Discordance with spamming flintlocks but with much higher dmg (even though multi attack won't work on ricochet). I could make richocet deal 700% from scatter shot, use skilled mythic as it would still work with richocet with discordance, push the limit. Even cosmic power + timewarp (optional), hero points , etc.
700% dmg richocet. With hero point. That means 1400% richocet. Skilled mythic can increase this to 2100% dmg. One push the limit I could get to 3100% richocet. There is the CD issue but that can be dealt with because scattershot has not too low CD and can be lowered. This means I could make richocet deal so much dmg whilst spamming it . Multi attack and extra attack wouldnt work though so I might not try it as no extra bullets at once but if I successfully build a distordance flintlock build in a weird way, that would be awesome despite no spreads.