Sole Survivor suggestion;

[Sailysium]

Mercy Stroke is a Tier 2 cross-class ability compared to a Tier 5 ability.
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I am not saying remove its functions. I am asking for it to be more reliable and activate-able like the other two; as well as its cooldown reduced or its power tuned to its cooldown.
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They are both amazing level 58 abilities. Sole Survivor is worthless by comparison.

I am saying that compared to other abilities; its power is trash since it relies on something to die for one; and it is WEAK in comparison for two.

While I can agree on your desire to see it's recast frequency in shortened, this whole "comparing abilities of the same tier" is not a valid outlook to base your conclusions from as they are all tailored to the design of the jobs respectively. Hell even tank stances aren't at the same level across all 3 but we compare them to each other anyway regardless because who compares by level anyway?. As has been mentioned Sole Survivor is more comparable to Mercy stroke but with a focus on mp recovery that DRKs try to find in order to pump out more skills. Think of it like comparing Monk's purification to invigorate which are as you put it at different tiers (which again doesn't mean anything). At first players thought it was worthless until realizing how the added sustain meshes so well with the design of the Monk job, especially for extending AoE capability.