Here's a Mr. Coffee brand Iced Tea Maker hack for you....
Instead of adding ice, just brew a double batch... (Brew as normal, less ice then refill the reservoir and brew again using the same tea bag(s) again)...this leads to a full pitcher of strong tea. You can then just add ice/water to your cup to your liking. (This works especially well if you have a water dispenser on the fridge because almost no extra work to add water to your cup but the pitcher lasts twice as long.)