I've done it 14 times with my alt.. all stamina towards the event.. used some for showdown as finally got harden on my alt. At some points ya had 25+on 2 of the 5 tokens.. but it balances out. They had to have something for chance to replace the specialist tokens..I?ve done it 11 times. All but 2 SG?s needed for 12th and +20 of the other tokens in inventory. Actually, I?ve got 30 SF?s,How many times have u guys completed the set?
Just keep playing the rarity of the tokens will keep changing.. maybe one will remain on top..