You may want to utilize the Vampire Lord Glitch, using it's powers in human, or in this case mer, form, to always have Summon Gargoyle equipped, and when first entering combat, use it then switch it out with whatever you wish to. That way it's more like you're using the same powers as the angels, rather than as a last resort, use it all the time. Since the angels animate statues and sometimes bring them alive, much like what vampires in Skyrim do with Gargoyles.
You may want to utilize the Vampire Lord Glitch, using it's powers in human, or in this case mer, form, to always have Summon Gargoyle equipped, and when first entering combat, use it then switch it out with whatever you wish to. That way it's more like you're using the same powers as the angels, rather than as a last resort, use it all the time. Since the angels animate statues and sometimes bring them alive, much like what vampires in Skyrim do with Gargoyles.