From what I understand (I am still a learning communist) mutual aid is good, but more as a tool. Like a hammer, its purpose it to build, to create. Mutual aid should be used not as a solution (by that I mean in the mentality that it fixes the problem, or should be the standard), it is the way to build workers power and community strength. It is to foster class consciousness within your area. So yes, I would say it is praxis.