That season you will tank in July (You will be Level 9, So you effectively stay in Level 9 twice). With Petersen getting older and fighting the test of time, the extra season you spend in Level 9 will benefit Petersen's quality throughout that entire season, Plus hopefully when you come to Level 9 there will be enough active managers to beat your inactive team for that one season before you return to the game. Be weird when you comeback to the forum and your Level 9/Season 10. Another option could be not tank at all and let your 6* team play the season on auto-pilot, there would be a good chance you could still win the league as we tend to notice that these auto-pilot teams seem to run well. I think a 6* team would certainly finish in the top 4 in the league in Level 9.