It was very unlikely for Cole to win the three man battle even with Wayde and an elder from the Epstein Family on his team, since Mason can have people on his team that are just as powerful if not more.
But if he was able to get the Epstein Family to agree that it should be a battle between youths that were 18 or younger, they would have a good chance of victory. Angela, Cole and Adam were a good match up and they already knew about the abilities of Martha and Damian who were most likely going to be the two to join Mason's team if it was going to be a battle between youths.
After telling that to Angela and Wayde, they agreed that it was the plan of action that had the highest possibility for success, but they were still both quite doubtful.
"I have greatly increased my skill and can fight in close combat, you are very skilled and have a powerful water elemental affinity, while Cole is also skilled and has a powerful wind elemental affinity" stated Adam.