Um, no. Kalista would have NO ult. There is no way she wins that with Vi in the pool.
Ahri does not lose to Zed. That's one of the reasons she is a first pick in the LCS now. She has high damage since the buffs, and she is extremely mobile. They both hit six and Zed can't assassinate her because she is actually more mobile than him. All she has to do is dash away, charm back at him, and blow him up, using the other two dashes to dodge away from him chasing or casting Q.
Azir at level 18 with full build ABSOLUTELY makes the top 3. NOBODY in the pool can even get close to him. Despite having skillshots, Kalista can't take him on because his range with soldiers is greater than hers, and he'll literally two-shot her. No one in the pool outranges him, and all the melees with gap-closers get destroyed by his ult. Only Zed would have a shot, and he'd have to get the jump on Azir with Azir's ult on cooldown.