I bounce around between 2 and 5k as well with GH/RR/Apoc. It's a crit hit ws, so you're not always going to be in the 5k area but generally, anything lower than 2.8k on exp mobs (most likely) means a missed hit or sever lack of crit on the ws. I haven't done a lot of testing outside of Abyssea but so far the hardest thing I've fought since obtaining Almace is Kirin and the highest was about 1.6k but other than that it was in the 900-1.2ish area. On easy prey dolls in Ro'Maeve the best I managed was 2.5k.
Since starting the thread I've updated my set with a few things...
Sword is generally crappy in the attack department and my set is pretty focused on dex so I eat red curry buns to give that little extra hitting power. Attack is really what drew me to Alcides+1. Outside of Abyssea, I'd go with Aias Bonnet (because my MKD head doesn't have 15 ws acc on it and Aias has more dex any way.)
I've never had a torque so I've always swapped in gorgets for ws on whatever job I'm on.
In Abyssea, with RR on you -should- be capped on acc, even more so if you have the Acc bonus trait set (which I always do) so gearing for acc on CDC is probably a lost cause unless you're fighting a mob that is unusually evasive...in which case I'd probably swap out my Cuchulain's Belt for Anguinus.
The major changes to my set comes when I SC with CDC because I hit CA/Efflux before I ws. It might be a bad habit, honestly...but I hate after using a WS I have to wait a few seconds before I can activate the JAs. So when SCing, head changes to Mavi Kavuk +2 and legs changes to Mavi Tayt +1 (still need a few stones -.-)
Food, Stalwart's Tonic and cruor buffs puts me at around 800 attack which I think helps quite a bit.
Edit: lol @ Almace being offhand. other way around.