Level 26 comeback

Hi TE guys

I have been absence for about a year and now starting a comeback with a couple of my friends.

i am currently level 26 and my team did well this season and i will be promoted in the upcoming days.

i have about 450 Tokens, 750 greens
right now my team has a (150.5) 101 % 6* rating
all the facilities are completely built out.
i have read through the forum here but appareny dont understand the „fast trainer“ concept... currently playing a 4-1-3-2 system tactics: normal, both sides, short, no // hard, normal, not man on man, no

what would be the best investment for the tokens & the greens? i would love to get the treble next season 🏆🏆🏆

is it also better to start e asocciation wirh my friends or to join an established one?

thank you so much for your help
best regards

Energy United