I'm a big fan of decoction mashes so I'd never say don't do it but it can be a chore. Ultimately a decoction mash is going to require you to transfer some of the mash from the MLT to the kettle and back again so there's no significantly greater risk of HSA if you have to transfer your entire mash to the kettle and back again than just a decoction. Personally I'm not concerned about HSA either way. Many, including myself, consider it substantially to be a myth.
You could always do a mixed method, infusing your first few rests and then decocting for the remainder. It seems inefficient to transfer the entire mash to heat and return it to the MLT, especially since you are sure to lose some temperature in the transfer.