SCH question Sacred Soil vs Shadow Flare

[Thorauku]

Since you specifically said that your concern is for Speedruns, I'd say Shadow Flare all the way. Is there even a boss below Titan HM difficulty wherein you need Sacred Soil? Guess none.

[Deceptus]

I have a bit of lag so I am a DF hero! But I thought I was playing correctly. The reason I asked is that when I tank and I get SCH healers I never see them put it up and was wondering if I was mistaken. Hence why runs always go better when I'm healing vs when I'm tanking. . . Vindication!

[Marionette]

SS is better when it comes to ability based damage, like say Geo-crush, but Shadowflare generally works out better for non-ability, aka mass trash auto attack, since the damage is low enough as it is, and the damage just add's up pretty well.

[Vortok]

The reason I asked is that when I tank and I get SCH healers I never see them put it up and was wondering if I was mistaken.

Most people that play SCH aren't particularly exceptional at it. There's a lot of little things to do as a SCH to optimize your play, so they might have just not got to the point of Shadowflaring yet. Or they're lazy.