My housemate did it today, with troops level X and XI (blasters XI borrowed from me).
He is human, used first line of silver spearmen.
Second line was 2 gold archers in the middle + 2 sets of gold blasters on both sides.
Last line horses, and heroes.
Avalon near archers, boosting their attack speed with aura.
Jacques starts the fight with his Spray ult.
Castle 40, Void - 92
All heroes except Wraxius.