I like the idea ,, Since no one but, you , will use your anvil you make it the way you want it .. Experience is the best teacher.
That being said ,, I do agree with Jeremy K ,, impact resisant welding rods is better (IMO) than hard surfacing rods ,, we use hard surfacing rods on things like Lawn mower blades, peanut plow points , Grader Blades , but, we use impact resisant rods on Hammer mills for the mines ,teeth on Track hoe buckets for rock breaking and digging,etc. Hard Surfacing is good for wear ( two things rubbing together ;Dirt and steel , Grass and steel,etc.)
( Please pardon my spelling I am a layman not an english teacher)