>>531453392
I'd move Glacial to the new support tree, rework Unsealed Spellbook, add an Ad/Ap hybrid Keystone and TRY to make a Klepto that isn't broken.
>Entropy Edge: Convert a portion of your AD into AP, and a portion of your AP into AD. Gain some attack speed and movement speed during combat.
>Unsealed Spellbook: Gain Summoner Spell CDR. After using 2 or 3 summoner spells, gain a SUPER summoner spell. Up to 3 per game. (Like a super heal that heals your whole team, or a super TP that instantly ports you like the old one did) OR combine 2 summoner spells, up to 3 hybrids per game. (like an ignite/exhaust combo spell, or a barrier/heal combo spell, or a clease/ghost combo spell) OR OR gain exclusive access to special summoner spells. (Vanish summoner spell, Castle summoner spell, Zhonya summoner spell. Can only be used once per game.)
>Ancient Coin/Klepto fusion: Damaging enemy champions causes them to take bonus magic damage and drop a coin. Collect coins to gain gold and burst of movement speed. During team fights and takedowns, coin value increases and they also give mana and health or something of the like.
(First Strike gets combined with PTA. Part of vulnerable damage dealt gets added to you as bonus gold.)