Ok I've just beaten the Sanctuary keeper(which I add was easier than taking candy from a baby)
I didn't use 1 Aeon after I just spent an hour charging them all up
I used Aurons "Banishing Blade" which if you hit the sequence right (Up L1 Down R1 Right Left Triangle) it cast armour magic and power break plus doing a nice bit of damage I then (after reading the bit on the Curaga's cast reflect on him, just in case then I had Tidus cast haste and brung Wakka in for Auron and let Wakka do attack reel's then the SK did one attack (which caused something like beserk) I then just pummeled the SK into oblivion before he could pull off another move!!!!
But to the point I've read on in Lisa's walkthru, and its says WARP SELECTS are now available so you can go back and forth to the plains, so where are they and how do you use them!!!!
TSA