I'm with others, as long as there is no progression (which includes story as for some that is the important part of progression, and this needs to be as fair as possible), no loot, and you can't enter a training turn until you have beat the turn prior in non-practice SCOB.

I would love to try healing t6-9, but my static can't afford for me to switch off dps, and our 2 healer's dps aren't geared enough for this to be a real possibility. This would allow me to try that, and also allow me to help other players practice and get better, which still benefits me because when someone doesn't show and I need to pug a person, well maybe now I can find someone who knows what to do. They get a clear, we get a win without the frustration of a carry, and everyone benefits.