I think a lot of people are having good results from using a drill with a grout mixer attached to it to create some extremely easy no-work mash mixing.
That said, I've never had much trouble with dough balls using the recommended amount of water from Beersmith and a normal plastic mash paddle. Unless you're going with a super thick mash, I'd just go for it and depend on the agitation from the spoon being an inch away to keep everything circulating as well as it needs to.
I am curious why you have a manifold that tightly spaced though. Record setting flow rate really isn't the goal for draining your mash, and I can't really think of another reason to have that many pipes going. You will want to careful of stuck sparges (and triply so if you're using wheat.)