On my smaller batches (grist wise) I tend to use my large whisk more than the wooden paddle I have. It is great for those huge beers though
I use a monster whisk on my thinner mashes. When my MT is thick, and overfloweth, a custom maple paddle my wife gave me for Christmas a few years back. I used to use a drill and stainless paint mixer. All are good I guess. My MT is too big for my spoons.
I have a 22" stainless steel whisk purchased at a restaurant supply store. I use it to stir the mash because it breaks up small clumps I might not have detected. It’s also a gorgeous piece of hardware.