I see no reason why TV/FV would scale better tbh. And from my testing with it, as long as you have a decent weakaura it's very easy to manage, might even be a further DPS increase sometimes since it's a 20y spell. It's a very nice niche spell, only belonging to pure ST fights (perhaps some high priority target fights as well).
If it sims 20k higher, then in practice it could yield even more. I tried it on Guarm the other day and it was insane how nice it works (even uptime during leaps/charges that a simple FV wouldn't land).
If you have the cloak though, I'd prob stick with FV. Seems annoying to track that buff + ES for a minimal DPS increase.