luizf_sp, I think that your opener is pretty good tbh, but I think you use too much skills oGCD while you could use GCD skills.
I made some changes to resolve this problem :
Always using Ifrit :
Rouse + Spur before pull.
Bio > Enkidle > Bio II > Radiant Shield > Miasma > Ruin II > Swiftcast > Fester > Shadow Flare > Painflare > Ruin II > Raging Strike > Bio > Aetherflow > Pot > DW Trance > Ruin II > Tri-Disaster > Fester > Ruin III > Painflare > Ruin III > Fester > Deathflare
With this opener you don't have that much downtime and you optimize your DPS with using a GCD skill whenever you can.
Feel free to suggest some modifications, if we work together we can find the best opener
