For openers, I use a bit of an in between of the traditional and Bio openers. The plus of this opener is having 2 DoTs ticking immediately, as well as getting a second Bio under Raging Strikes (Clipping initial Bio at 1-2s), but I can't really say it's better/worse than the traditional or Bio openers; I think it's all very close... Just putting it out there as a consideration.

This is with Ifrit-egi.

X-Potion > Raging Strikes > Bio II (Hit as boss is pulled) + Obey during cast > (Move towards boss) Bio > Rouse + Spur > Miasma > (Move closer if still needed) Swiftcast > Fester > Shadow Flare > Enkindle > Ruin II (X-Potion end)> Poison Pot > Ruin II > Bio > Fester (Raging Strikes end) > Ruin > Ruin > ...