For Titan I understand unbreakable was the new aspect but I feel like demo would work 100x better as a void aspect not in the sense of strength but the fact it adds a spreading explosion effect to abilities (Yes I know this is adding on and not replacing but unbreakable always felt like the odd one out) Then honestly for strand I think into the fray since Titan prismatic has very little dr and healing. Then I'd say for Solar probably Sunspots. Again like demo it'd add a bit of spice to other abilities but the big thing is adding a healing effect even if it's a REALLY low healing effect. Plus if I'm being honest here hammer of sol sucks without roaring or sunspots being present it's arguably the worst super (In pve not pvp) since bungie built the thing AROUND those effects. Hammer of sol deals less damage than a primary, can only throw about 6 hammers, and has one of the longest cooldowns. All because its damage and duration is balanced around 2 aspects that aren't on prismatic. For arc...it's hard to say. Touch of Thunder would only work on pulse and tbh Touch of Thunder's grenades aren't that great anyways. Juggernaut is a pretty awful aspect in pve and honestly not great in pvp either. But I feel like giving storms keep is a bad idea. At least maybe. Consecrations nerf basically dropped prismatic Titan from being the best subclass in the game to being one of the worst. But storms keep is also the only thing really keeping arc alive and I think it'd be kinda dumb to give the reason people run arc to another subclass. So I can't really pick one for arc. As for stasis I'd probably just go with Tectonic Harvest. Something useful but not the main reason people bother with Titan stasis.