We have new item: Item haste and ability Haste double stack item!

i have 43ability haste and 25item haste and the base cooldown is 15sec
100/(100+43+25)*15sec = 8.93seconds cooldown
or
100/143=0.6993
and 100/125=0.8
0.8*0.6993*15sec = 8.39seconds cooldown
or, only ability haste would effect item,
0.6993*15=10.49sec cooldown
Seems i need to add them togethor itemhaste and abilityhaste
So you have a rune that gives 35item haste, Ingenious Hunter
Goredrinker can become like 5sec cooldown
2000missing health*0.12*3champs=720 heal per 5
720/(3000max life*7%Zac passive) = 3.43 Zac chunks per 5 sec
Not that mega massive
btw, my Heimerdonk likes Shurelya's Battlesong alot! 17.5%movespeed in a single item, with tank-sustain-haste-party