Pay Onwenu to stay a few years as the right tackle of the future, make Sow the new right guard of the future. Strange is your left guard, hopefully Jake Andrews can take over for David Andrews in 1-2 years. Left tackle needs to be figured out but it is Brown for now and maybe you can keep him another 1-2 years, he shouldn't be that expensive. Pay him a little more next year than you did this year since he'll know he's the LT this time and he should be happy. Draft developmental tackles and see what you find.
At that point I think things could start to fall into place. Mac showed us yesterday that even against an aggressive defensive line, if the OL is good and picking things up and he trusts them, he will stand his ground. So build a good OL and you are moving in the right direction. A "true #1 WR" would be great but Mac will hit the open man quickly if they can protect for 2.5 seconds consistently. Maybe they can pony up for Mike Evans as a free agent. The cash is available.