You needn't worry about Final Coil being required to unlock Alexander, the end game for 3.0. Though if you want to beat the Coils for the sake of saying that you did them, I can understand that. If you were on Leviathan I would introduce you to a linkshell I was recently invited to. They helped me get my T5 clear for my Leviathan character last night. (I've already done up to T7 on my Behemoth character, so now, both are caught up.)