SCH lacks a single target mitigation ability

[Absurdity]

Multiple reasons, savage tankbusters can be a lot less risky with critlo, you can deploy that critlo before the tank gets hit for a subsequent raidwide, for some mechanics taking zero damage can nullify the subsequent DOT, if you have other healing buffs like natures minne or krasis a critlo can absorb more HP than critcog restores etc

The only downside is adlo needs a GCD

Point taken, although I don't think you can avoid a DOT with critlo in content where that DOT is actually dangerous.

We're probably also not talking about savage mechanics in this case as they mention big pulls at the end of the post.