Quote Originally Posted by Rinari View Post
The Wondrous Tails (Tails instead of Tales.. no clue why)
Because it's a Miqo'te child who gives you the books so they are being cute?

As to the OP, the Crystal Tower raids are done more than the Binding Coils of Bahamut. Partially because there are only 3 levels of Crystal Tower and 13 coils. You will find people doing the "key" coils - 5, 9, 12, and 13 - but not the rest so much. Party finder is the best approach for coil (and people will want to do it unsynced [lvl 60] to make it easier) but you can probably get into Crystal Tower through the duty finder.
Once you get to 50 and are gearing, I'd start with Crystal Tower because it is more forgiving (more people).