Hello Blizzard. I try use the fun corruption you added Ineffable truth i got it to 240% total cooldown reduction.
And now it started to glitch randomly oneshotting a pet not including Main felguard pet, but including tyrant, VIlefiend, grimoire: Felguard and dreadstalkers. what i found out so far atleast is that it seems there is a limit of 5 dreadstalkers at once when u summon third pack to get 6 total running one of the dreadstalkers/vilefiend/grimoire: Felguard/tyrant gets oneshotted!!! tyrant seems to dissapear/despawn here where the other pets just get killed instantly. when you summon 2th vilefiend to get 2 running 100% of the times the first vilefiend+another random pet gets oneshotted 
specialy in raids all damage around tyrant i get too many dreadstalkers out and they kill/despawn my tyrant and RIP DPS.
Please look into this issue was’nt really fun spending so much time since the start of the season farming all this gear for a fun build to oneshot my own demons fighting for me.
Best Regards.