ok first of all i think u mean jupiter sigil, FOOL!

1. get attack reels by winning tournament (easy
2. rack up a total of 250 fights gainst fiends
3. win the current league then the subsequent league to get status reels. to ensure u get status reels, after the last match select "back" not "return to blitzball". then save ur game. then access the blitzball menu. if its ther then play. if not then load and try agen
4. after getting that fight a total of 450 fights against fiends
5. play the tournament to get aurochs reels
6. win the league and use the method above to ensure you get the sigil for the next league. then win that league.

oh and no, u have to play all 10 matches