Been running a dragon claw/toxic/heal bell/roost altaria, though cotton guard is definitly a better choise than DClaw. Only huge threats to altaria will be porygon-z and mixed sharpedo(which i can think off at the top of my head) There arent alot of common steel types apart from ferroseed(as i can think of atm, once again)
Anyway, Altaria is a great toxic staller and with access to heal bell its an amazing supporter and wall
Anyway, Altaria is a great toxic staller and with access to heal bell its an amazing supporter and wall