I agree, for a "hard to get" item like the Culacula, it only took me about a week full.
I got my Stenz (the starting club on Wednesday the 24th. Got all the mary kills done that night, In a little over an hour actually. Went onto Dnatbat killed him 2 times by 1 Am then went to bed.
Popped on Thursday the 25th, killed him the last time then went to Dune Widow, got 3 kills that nite. Then to Seww the Squid, killed once then went to bed.
Friday i popped on, got the other 3 kills on that and went to get Ankabut, got 1 kill before going to bed, the party was nice enough to let me stay, while i was sleeping to get credit for the other 3 kills.
When i got up on Saturday morning (got up at 7, don't ask me why XD) I popped on to get final Kill on Ankabut. Ran out to Mis coast, camped that NM for 5 hours before it popped, through the rest of the day i got the other 3 kills, talked to all the Whms and Sams i befriended during all of this (Sam path runs into this one as well) and planned on getting Urd the folowing day.
Went with one of the Sam later that night to try to get the colorful Abyssite. He got his, mine went 0/25ish ~.~
Sunday i got on early again, didn't start on Urd popping until about 1 PM, got all 6 Urd kills + 3 Lamprey Kills before we called it a night.
Popped on after work yesterday at about 5:30 as the group was recovering from a Lamprey Wipe, so i ran out, and all in all, got my last 3 kills and now have my Culacula.
Realistically, the longer you wait for these Weapons, the slower its going to take. People are on a Streak of killing the nms now, i'd say befriend poeple along the way and start on it asap.
So total it took me 6 days to get the highest damage club aside from Mjollnir.
Yes, its a lot of time, however getting Krabkatoa shells, i think, is going to take significantly longer, as its an Actual item you need, instead of just kill credit, and the mob drops 0-2 of the item.
Sure Urd and Lamprey sucked a bit, but we were able to kill with a Min of 10 people. (we had a lot that needed it, probably could have done with a very balanced party setup)
Chocobo Status: Retired Green, Black, Red, Yellow
Whm/Blm/Rdm/Mnk/Thf/Pld/Blu/Smn/Dnc/Pup/Bst/Drg 99, War 91, Brd/Sch/Sam/Nin/Cor/Drk/Rng/Geo/Run 60
Alch 72+1, Cook 66, CC 61+1, Wood 61, Synergy 56, Bone 54, Leather 51, Gold 49, Smithing 45, Fish 15 http://ffxi.allakhazam.com/profile.xml?143946