only needed 2 items (testing out new mythics). I can confirm that Radiant is best for my Illaoi, but I will explore all new mythics! Currently finished with this and Jak'Sho. :
Illaoi Build with Highest Winrate - LoL Runes, Items, and Skill Order
Illaoi Top Build, Runes, Counters (Patch 13.06) - OP.GG - League of Legends
The Cleanest Illaoi on the Rift in North America - YouTube
Illaoi Build, Runes, Items & More - Mobalytics
Raid boss Illaoi initiated. - YouTube
10 Kill Illaoi GOD destroys Grandmasters - YouTube