adjustable gas block is the best bet. but you don't need the heavy buffer.that's why you have a adjustable gas block.you can tune it down to the lowest kick and still have the gun cycle.
i did this with a 5.56 ar and its going on my 6.8 build as well.
most people dont do adjustable gas blocks due to lack of how to set it and don't like working on there own guns. just my opinion.