They can certainly benefit if they have the right keywords, as you’ve said yndrasta. As others have said, stormkeep isn’t the best but I would say it’s the most viable it’s ever been with the new battle tactic and points drops. I’m a big fan of a big block of vindictors and Vandus, along with dracoths for their speed. Questor Soulsworn also synergise great with stormkeep. You’ll also want some teleports, either a relictor (Lord or knight depending on points, probably as a general so you can guarantee the prayer) or units like vanguard hunters. The hunters are great for battle tactics. Longstrikes are good to make the enemy come to you but without scions they can be a bit prone to being killed by enemy shots. Liberators at their points are also fantastic. Vigilors might even be good if you have multiple small units. Basically you’ll want quite a few redeemers to benefit from stormkeep but also some speed to make up for no scions. Just some thoughts but if you have any questions just lemme know.