It's just a choice you have to make. I prefer refreshing SS rather than switching into SoI. I don't think there is that much difference between the 2 playstyles and either are fine. You would get more SoI uptime doing it your way, but I'm not actually sure whether it would be much more than a 5% increase over a fight, I always seem to be delaying whenever I switch seals. That said, I avoid the talent like the plague. So maybe I'm not the best person to talk about it.