Viego & Zilean Synergy
Viego Jungle and Zilean Support win 51.0% of 1,552 Low Elo games together, -0.3 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
Playing the duo
Time Warp(E) can speed Viego into range; after Spectral Maw(W) stuns a target, Zilean can follow with Q-W-Q to detonate a double-bomb stun.
How to play as Viego
Coordinate with Zilean before a gank: let Time Warp(E) help you close, then use Spectral Maw(W) to give his Q-W-Q sequence a reliable target. Do not dive alone expecting Chronoshift(R) to rescue a fight the enemy already controls.
How to play as Zilean
Use Time Warp(E) as Viego approaches, then wait for his Spectral Maw(W) or another ally's crowd control before starting Q-W-Q; Viego players say the revive alone is unreliable if the enemy team already controls the fight.
Sources
These notes come from r/ZileanMains and r/ViegoMains, checked against the champions' abilities.