Well I didn't apply this method for leveling alts, since it's a loss when it comes to monetary rewards from the quests themselves. Instead I did something else. I had the scroll from received from the final quest in Clockwork City saved up (it's not bankable anyway) then I pre-crafted all my alchemy and provisioning master writs I had saved up over the previous months using an addon. I've then turned in all the quests in short order, before the scroll expired; I even had time to turn in some gear quests as well I had crafted at a guild hall. I think I've managed to gain about 8-10 CP (9-11M XP) in 2 hours the scroll buff lasted. Not that it mattered, since I'm well above the limit, but why not do it? The reason I decided to clear up the master writs was that I had ran out of space for storing them and they ended up clogging the inventory of the chars I planned to level - I did level 4 of them, but trough slower, more conventional ways, namely normal Maelstrom and dolmens.