Well, Ares is obviously the weakest link here, so it's a tough uphill battle for Thor. Wonder Man can at least fly and while his stats are inferior to Thor, he's fast and strong and durable enough to be worth a damn.
I assume Diana is classic here, but I'll ask if she is anyway? Also, is this without any stipulations? So standard equipment, all powers, etc?
I feel that Thor is the most powerful and strongest member present but he's also partnered with Ares, the least powerful and durable and the only person grounded. As such, Ares is more likely to drop first than anyone else present, allowing Diana and Simon to score the win on him. If Diana tackles Thor, it will be a tough fight that will last quite a while. Simon should handle Ares before then. If vice versa, Thor would ultimately beat Simon, but Diana would handily defeat Ares.
Team 1 should get at least 6/10 wins overall, all things considered.