An Evis with FW will always do more damage than a Rupture cast at that point, no matter what buffs you have up. Without 4T15, there's no reason to stack Shadow Blades with Shadow Dance, as you already are dealing true damage thanks to FW.
Personally I prefer opening with Garrote->Hemo, so that when I Hemo it's already SV buffed and FW buffed so you get a Hemo that is moderately stronger than just straight opening with Hemo (and thus a Hemo DoT that ticks that much stronger as well). Garrote also does more average damage than Hemo with no SV/FW up as well, so you gain a bit more damage by opening with Garrote and Hemo after.