Proposed Zilean Rework?
A friend and I were talking about Zilean being... subpar with his otherwise lack of damage, and I thought up a solution to his lack of gameplay. Here is his proposed ult rework:
While Zilean (or ally) is in stasis, all enemies nearby are slowed by 90% (or an otherwise dramatic amount; think, Nunu). If they're still caught within range of Zilean's ult after Zilean (or the ally) is resurrected, the enemy takes 300/550/900 true damage + 150% AP. These two damage numbers are separate, similar to Jayce's Hammer E. (Any minions killed by this ultimate's damage count as CS for both Zilean and the ally. Any champion kills obtained by the ultimate count only for Zilean though.)
This Zilean ultimate rework will allow him to see more gameplay, especially in mid-lane. I don't think he would be a very good support, since his Time Bombs deal so much damage... and can accidentally steal a lot of CS.