Combinations of DG's require specific DGs, items, skill levels, and/or actions to counter them. Without pre-game coordination to counter them it takes an unreasonable amount of skill to defeat and hence they are forbidden.
[quote who="SoFFacet" reply="20" id="2298716"]These objections are so arbitrary. Apparently its ok for people to play defense with Bramble + Heal, but not Heal x2. Its ok for people to harass with Spit + Snipe, but not Snipe x2 or Spit x2. Its ok for people to spike with Mines + Penitence, but not Mines x2 or Penitence x2. Reductio ad absurdum: Non-double teams ought to be banned! They are not fun to play against and are OP because they have different and complimentary s