Arcane Comet on Renekton

Sounds silly, right? Well I'm having a good deal of success with it! It's extremely good in lane as bonus harass, and Celerity + Scorch makes for a great laning phase alongside Boots or Doran's Shield. Top it off with Ghost+Ignite, Coup De Grace and the AS Legend rune and first bloods are sure to follow!

Arcane Comet can be assuredly landed by holding a champion in place with W right after landing ability damage. It doesn't proc from W but it does proc from the rest of his kit. Speaking of, Ultimate Hat is fantastic on Renekton in particular as it's his "we win teamfights" button and it helps him have it up for every teamfight!

You need to unfortunately compensate for the lack of resistances: any mage whatsoever demands a Spirit Visage, bare minimum; any magic damage beyond that a hexdrinker or QSS. Every game in general demands 2 armor items, Tabi included.

This leaves room for only 2 purely aggressive items each game. I pick a pair of items that was once taboo: BORK + Hydra. Together they offer everything a croc could ever want: tank shred, burst, sustain, AoE and dps. None of it in spades, but it makes for a very "jack-of-all-trades" build for him that puts in work no matter who he's facing, even a lategame marksman or hypercarry.

If you have any offbeat builds so far feel free to share them!