Dr Strange uses 50 XP to Upgrade to 110pt FF version

TopDog’s Defenders

1) Silver Surfer 100 - SA [3] 15xp
2) Namor 100 - SA [2] KO [1] 20xp
3) Doctor Strange 75 0xp
4) Daimon Hellstrom 66 SA [2] KO [1] AST [1] 25xp
5) Clea 59 - SA [2] KO [1] AST [1] 25xp
For this game 20XP/5 = 4xp Each
Theme bonus - 20xp/5 = 4xp each

YTD Stats
The Defenders
Namor 100pts (T) - 46XP
Dr Strange 110pts (T) - 6XP
Bruce Banner 50pts (T) - 18XP
Silver Surfer 121 (T) - 51XP
Brother Voodoo 79
Daimon Hellstrom 66 pts (T) - 33XP
Madame Webb - 24 pts
Clea 59 pts (T) - 51XP
Astral Strange 13 pts (T)

The minimum upgrade cost is 50, but you also keep any points left over.

Doombot is correct