Ok, lets use Freya. Also a swordsage, also Tier 3, but slightly more optimized. Actually based off of Izzy, come to think of it...
I only need 2 buff rounds for Freya.
Buffs Spoiler
Show
All Day: GMW, GMA, GMWallop,
Refreshed every 10 minutes: Mirror Image, Shield
Round 1: Prismatic Wall between M and N, 30ft high
Round 2: Bite of the Werebear
Initiative (1d20+6)[17]
Starting Location Spoiler
Show
B12, 25ft up
You see a giant, 30ft high, wall of swirling colors passing through the center of the glass structure.