Bleeding Edge Iron Man and War Machine attack Wakanda in place of the Outriders and have the Iron Legion from Iron Man 3 to support them (but they will only perform as well as they did under AI control).
There is no energy field around Wakanda.
T'Challa and all his allies shown in the Battle of Wakanda are present. Falcon, Steve Rogers, and Bucky are also on Wakanda's side.
1 day of prep for both sides.
1 mile apart
Fight to the death or surrender.