How many UL challenges for free player(starting from zero tokens)

So I'm currently in the process of rebuilding my team, I've done the new promo for all the 96s and the weekly wildcard challenges. so now i was wondering about UL challeges? Also, I'm looking for suggestions on who to take( below is a list of most needed positions)

1. TE 2 (i have micheal burton 86 lel)

2. WR ( best receiver is 96 hines ward)

3. RB ( could probably do aka challenges for flash)

DEFENSE

1. CB ( all my corners are below 95)

2.SS

3. LOLB and ROLB

GunnerBoi said:

So I'm currently in the process of rebuilding my team, I've done the new promo for all the 96s and the weekly wildcard challenges. so now i was wondering about UL challeges? Also, I'm looking for suggestions on who to take( below is a list of most needed positions)

1. TE 2 (i have micheal burton 86 lel)

2. WR ( best receiver is 96 hines ward)

3. RB ( could probably do aka challenges for flash)

DEFENSE

1. CB ( all my corners are below 95)

2.SS

3. LOLB and ROLB

UL tokens is 125, so i'd  do the first 8 or 9 weeks. then i'd get BIG DOG aka off auction, he's an insane blocker at TE. for another TE, do pete metzelaars or evan engram