retire. don't boost next time. train strength/blocking intense until you can bring strength to the point where it costs 2 sp to raise anymore all at once. IE: Don't spend your first 15 SP. Train. Train. Level. Don't spend SP. Train some more. Level. Look at strength. If strength + your saved SP = 48 or 49, put points into it. If not, train.
or if you want to boost and just play like normal. just bring str blocking speed agility stamina confidence and vision to cap. to start. it doesn't really matter how you build linemen anymore. they will be good. lol.