Aylin isn't weak. She's probably the best tank you can have. If you manage to position her correctly (in a way that she will be outside the healing blocking aura if she drops to 0 hp), she'll be able to tank all melee attacks from the avatar of Myrkul on tactician difficulty without needing any heals or support from your group. Then you simply put some damage over time effects on the avatar, use your party to destroy the skeletons before they spawn and it will be one of the easiest boss fights in the game.
