Help with my arena team

I’m trying to put some finishing touches on my arena team. My team as it stands now is here https://www.fehkeeper.com/team-7878-1168

My ideal team composition is to have two enemy phase walls in the form of Zephiel and Sheena that can cover all bases when holding the line. I also want two ORKO powerhouses with Effie and Zelgius that can punch through against Grima, Myrr, Winter Tharja and Zelgius before they can fire off a special. Everyone currently performs their tasks well but I want your opinion on how to optimize the builds for my Effie and Zephiel. In the included team image my current Effie and Zephiel are on the left and my optimal build for them is on the right.

My current thought for improving Effie is combining Bold Fighter and Quickened Pulse with Brave Lance guaranteeing a Galeforce proc on her first attack allowing her to either kill again or retreat. Currently she only kills reds and blues but giving her Bold Fighter on a damage calculator gives her only 4 losses vs the entire roster of heroes. It seems really good but Bold Fighter is hard to come by and I just want some input before I make the sacrifice.

For Zephiel I am trading the stopping power of Wary Fighter for the defensive killing power of Vengeful Fighter and Aether. This is the upgrade I am most unsure about as it will make him a worse tank against blues , against which he can currently survive an enemy phase hit with Wary Fighter. But..... the dude takes forever to kill anything.

Anyways, any and all input is appreciated. If you see a better way to build them to optimize their roles please let me know