Well, without knowing what your levels actually are and exactly where you are on the Leviathan, all I can say is that the Dreadnought is a great place to gain some levels if you need them. If you bought Charge in Bhujerba it'll really help you out in this area.
Anyways, first off, the alarms when you first get on board. You can get through without triggering, but you can also seek them out on purpose. Prepare the party before you trip 'em though, you'll get a fair sized group of enemies every time. If you're really in need of levels, trip the first alarm you come across, fight that group, then run back to the crystal and save/heal. Repeat as much as you want and your levels will start flying up at a fairly good rate.
If you've already passed that part, once you break Ashe out check out the other cells to find a save point and Moogles who will sell you supplies. Now when you try to leave from there the alarm will be going off until you turn it off via security points. This is the point where I personally think is the best for leveling (since you finally have Ashe) and just start clearing out soldiers as you go.
And that's basically it...the bosses can be a bit tough on the Leviathan but the unlimited supply of Archadian troops to slaughter mitigate their powers, as you can just outlevel them heh.
If you need help with anything specific feel free to elaborate, it's been a long time since I last played so I can't say I remember everything definitively.
~DragonHeart~
Bookmarks