I myself, am going with crit rate and det. Acc is so easy to come by, 90% of the i100/110 accessories already have it on them. If you have the money I would do that. Depending on your server's materia prices, you could always just go with a tri build of crit, det, and acc. The latter would be a safer bet because it's a bit easier to balance some gear out. The reason I say to go with crit and det, is because its actually better to plan your gear. Since the high allagan is also crit/det, it's a direct upgrade. So you can start figuring out what you need for BiS gear now.