I completed this yesterday using the standard composition, (no Sabine) but moved all my speed mods over from other characters. All level 85, gear level 8, all omegas (except Heras' Back up plan). No Zetas. I moved 25 mods in total.
In looking at just your mods, all I have to say is that you might have neglected them a little too much in your game-play. Your lack of speed arrows is quite apparent. I think you have quite a chance for success if you farm for speed for the next couple of days, upgrade them to level 15, and then try.
As an example, I have ten +30 speed arrows. I seem to get one for every 20-30 attempts. I don't know if that is about average, but seems to be for me.
Higher speed can make up for lower gear. Lower speed is hard to make up with gear.
