How Many?

Is doing two rituals a month from Damons Brands “the 72 Angels” too much? I want to master this book and eventually move on to “Demons of Magick” by Gordon Winterfield and learn to do rituals in conjunction with Damon’s Brands book. Currently I’m using Corwin’s Hargrove’s “Universal Magcik” to amplify the working’s I plan on doing with the first book. So my question (second question rather) I guess is, is this too much, or is there no such thing?

Only you can decide that, but each ritual is done for 11 day,s so you can take a few days rest in between to prevent burn out.