No actually, it is useful for Mdef, It's very useful at least imo. With the gear you have, you can hit 75 base mdef easily with a Maya and you can easily tack on a ragamuffin for more mdef if needed. I didn't use a Maya for the longest time, but when I finally got around to getting a Valk Maya, I loved it not only for Autoguard, but for Mdef. I was being frozen about 60-70% less with a Maya on.