Sorry @glyph250, looks like the balance was thrown off by a recent change to add a graphics mark to the spell. It unintentionally caused it so that witches don’t heal a target which has just been healed–so in this level, the witches would end up healing each other when they first start taking damage instead of both healing the hurt ogres in front of them. I fixed it so that the old behavior was preserved and now the level should work properly with the soldiers-kill-nearest-witch-and-archers-kill-nearest strategy.
Thanks for the bug report!