Tested a few Heimergames! its hard.
the Mystic items not that good, only Liandry seems worth it, but expensive and super glass cannon, and not that good as on Bambi or Teemo or Brand
Ryla better slow, but more expensive and it only have AP+life, and it not boost Liandry damage any more
Cosmic drive seems nice, but expensive and only gives +19,6 flat movespeed when have 18ability haste runes
Deadman seems buffed, with the +5%movespeed, and still have +60flat movespeed, but i just getting used to not building it or only as a 6e item
deathcap nerved 40>35%more AP, and cost more
i used to do Presence of mind and manaflow band combined on Heimerdonk, it was supergood, infinite mana without a single mana item
manaflow band+600Liandry mana not gives this infinite mana in the endgame (no assist 20%mana refill)
the new Pressence of mind not sinergy with manaflow band, the 500missing mana*0.01regen, and it not works vs minions
the redemption mana regen got nerved
Heimer have 725mana at lvl18