Okay, so let me share my experience as Lancer here.

I have a perfectly suboptimal setup. Full AF gear, Malignant Mogfork and one NQ Electrum Ring.

I rarely, if ever, miss on moogles my important combo-building WSes, Leg Sweep every now and then will get a miss when used in a mass of moogles and Chaos Thrust hits everything almost always (almost makes me sad, I loose two steps in my full combo). I have done Garuda exactly once, we had a Bard drop an Accuracy buff on us, I did not miss anything up until she used Mistral Scream, then we died.

I am yet to do Ifrit after the accuracy fix.

So pretty much, accuracy is not a huge issue, it's good to carry an Electrum Ring, I believe, but Gladiator has worse accuracy than Lancer right now.