Umbral mods for maximum HP and Ability Strength.
[Transient Fortitude] and [Narrow Minded] for another boost to Strength and a small boost to Duration for those longer Reaves and Thrall Durations.
Range does literally nothing except being able to Enthrall enemies from a bit further away, and making your Danse Macabre beams a bit brighter (while doing absolutely nothing to the damage output or actual range of it)
Natural Talent is a must-have on Revenant, because it allows you to 1) Enthrall enemies while running through them, 2) Re-cast Mesmer Skin while under heavy fire without losing any HP, 3) most importantly, you can use your Danse Macabre as a quick "wipe all" instead of being the boring permanently spin-to-win Revenants you keep seeing.
Utilize all them skills!