Best beneficiaries of an Aquilan Shield bodyguard?

[Wrath of Bruinen]

Based on the leaked and previewed rules doing the rounds, it looks like an Aquilan Shield captain can make a pretty impressive tank for an imperium character. Not necessarily saying you'd do this every time as it's very resource intensive, but at its peak you could stack the Revered companion WL trait, the Praesidius shield relic, +2 wounds Captain commander trait and stick it in range of a vexilla magnifica for a captain with: -1 to hit, -1 to wound, 2+/3++ halving all damage.

 

**Note** transhuman physiology won't also stack as that only works on unmodified wounds of 4+. But against anything that would normally wound on 2s, you can get some mileage out of it.

 

When using the Aquilian Shield unique stratagem, you can have this golden boy tank for a friendly imperium character within 3" against one enemy unit for that phase. Against enemies hoping to do a lot of chip damage from many different units the tactic might not work, but against something big (Castellan, shadowsword etc, or double shooting slaanesh havocs etc), this guy can put a serious dent in the enemy's firepower.

The question is..... who do you take to protect (because this is the kind of combo I think you need to build a list around).

 

The main one that's been suggested online so far is an Imperial Knight/Castellan character. But is there a hidden gem who might benefit - a glass cannon just crying out for protection? To my mind, it's got to be a character with 10+ wounds (as the only thing hitting smaller characters are snipers and a few other corner cases, and the main threat there is mortal wounds which this guy won't do much against). A Tank Commander and the Triumph of St Katherine are the two Imperium 10+ wound characters that leap out to me, but are there others? 

 

The more I look at it the more it seems to be too big an investment for too little gain (outside protecting a castellan, which I'm sure will get nerfed). But maybe I'm missing something...