You said the magician does high damage? Is there any displacement? If there is no displacement, it is a living target.
You said the bow has a long range? Is the burst high? If not, it means the damage is slow.
You said that the warrior values are balanced and the output is enough? If it is not enough, it can only be done in the current row.
You said that the assassin has a high burst. Can he get close? If not, he will be treated like a dog.