If your Ally drops, you can now control their units and buildings including using their resources and buildings to create new units. The remaining team members should all help control that dropped player's town. Hold down alt to select the dropped players units
among your own or double click on them. select their unit producing buildings and right-click on your Hero. This will instruct their units to travel to your Hero after they are created. Assign unit producing buildings to hot keys and press them
every so often to train new troops just in case there is money built up. Using those methods you can come close to making up for that player's loss to the game, especially vs lesser players. Very often opposing forces will try to destroy your dropped ally main town and expansions right after your Ally drops, be prepared for such attack, or even better, anticipate, attack them before they are ready, in any case do not leave them the time to organize for such an easy task. More than ever it's wise to keep a Town Portal Scroll in both your ally's and your own Heroes' inventories. DefeatA team is only defeated when all of the buildings of all team members are destroyed. A team can
also be defeated when all of the teammates have left the game except one and that one remaining player no longer has any of their buildings (only has their allies buildings to control). You cannot eliminate a single team member by killing all of their buildings. Since this is the case it's best to destroy an opposing team member's ability to produce units and gather resources, then move on to hit another town. You can then come back and clean up the town after you have won elsewhere. Don't spend too much time focusing on killing all of the buildings of an opposing team member, because they can simply just share unit control and start controlling the units of another person on their team. Stay With
Your Teammate Until You Are EliminatedDo not just leave the game when you start to lose. By doing, this you are stabbing your teammate in the back and turning your back on your teammate. Help your teammate until you are eliminated. If
you lose your town, you can ask to share your allies' units. Help them better control what they have and continue with the game. If you still have a worker left, ask your teammate for money so you can rebuild your town.