Lets form a small checklist of things that will increase efficiency. Without debating so much the merits of each, just simple things one might do.
Long slow fly sparge
mash Ph set to 5.2
Thinner grist ratio
Temp rest @ 115F 30 mins to break down large sugars.
Study grain specs like % moisture, starch content
Longer mash time.
stir mash well before sparge.
proper grainbed depth with good design drain that rinses all grains
collect extra wort and boil off longer.