Assuming nothing changes where the Order Convictions are concerned, the only one I see as a complete dud for the warsuits is Sacred Rose. Getting a MD back on a 5+ is nice, but the OW bonus is better on large squads, not three heavy bolters. Also, ignoring combat attrition when the unit is too small to fail the test is pointless. As for the other five, in no particular order:
* Valorous Heart for more survival or Bloody Rose for more killing are fairly obvious.
* Argent Shroud is handy for being able to advance and still fire the heavy bolters or multi-meltas, but Retributors do it cheaper and get one more shot.
* Martyred Lady has an interesting dynamic with a unit of 2+/6++ T5, 4W models since the survivors will be BS2, WS2
* Ebon Chalice would give them more survival against Mortal Wounds and recycling a Miracle Die on a 5+ is handy, but I don't know if those two items are worth going EC for beyond the obvious "snag the WL trait" -- which can be done in a detachment with units who don't care what your order trait is like Mortifiers.
Edited by taikishi, 02 June 2021 - 03:09 AM.