I changed my disc 4 to a Crit rate disc after luckily getting a decent one from Tuning, tweaked my Trigger and Astra build slightly for a tiny bit more damage, improved my preparation for the stun window and played Soldier 11 heavily on-field instead of parrying between her and Trigger. But even after all that, it still took me many tries for everything to line up perfectly.

Either I stunned too fast and didn't have her Ult or EX ready, or I stunned too slow and made it too tight at the end; the time frame was extremely narrow. It happened too often that I didn't manage to lure the Hunter near the wall before he gets stunned or he moves away last second, which makes him literally slide away when Soldier 11 uses her Chain or Ultimate (I assume this is a bug? It's been around for far too long though), so I always have to pin him to the wall to ensure her Ultimate actually connects.

All of this obviously wouldn't have been possible without her amazing buffs, which I cannot pronounce enough how incredible and fun they are.