Since the tourneys r not based on beating specific ppl for placement and instead rely solely on points, there is an easy method to not spend hour after hour and to maximize your contribution:
Do all of your battles from 2 hours b4 reset until reset. U will face easier squads initially that u can use ghetto teams to beat, limiting your refresh costs.
Refresh until u find a team on the far right that u can beat. U maximize points per battle.
Since there r 2 refreshes where costs r reset, use 1/3 of the ally points u intend on spending each time. B4 1st refresh, b4 2nd refresh, after 2nd refresh.
These tips will minimize time and ally tokens expended and maximize points and placement.