If I'm doing something like Ongo where you need as much Nitro time as possible to land Threnody/Elegy and also as much SV time to re-apply - I will do CC -> 5 dummies -> SV Nitro 5 song.
If I'm in Odyssey I will do CC -> SV -> Nitro -> 3 HQ songs, 2 Dummies -> 2 HQ Songs.
Once the COR Wild Cards you can kill mobs at the first camp then re-apply Nitro at 2nd camp before SV wears off to get an additional 3 minutes out of SV songs which should take you up to the circa 14 minute mark.
Then if you get it you can re-apply SV songs again either straight away or on the top floor. Your preference.
I used to apply on top floor but now I just go back-to-back and can spend 25 minutes or of a 30 minute run with SV songs on.