an easy way to land it on the aurochs symbols: there are 2 symbols in the reels with a different symbol between them. use the first aurochs symbol as a mark point and try to stop the reels half-way between the different symbol and the second aurochs reel. this shuould get u the aurochs reel overdirve.

NOTE: if ur wakka's attack does more than 9,000 then ur better off using attack reels as if u get twelve u will hit for 108,000 whilst the max damage of aurochs reels is 99,999.

P.S ur welcome!