@HPK pick drills with 1-2 of the lowest attributes.
For example tackling and agrresion is low enough so you can train him with 1to1 finishing,warm up,carioca,hurdle jumps etc...
Remember that drills have limits 180 per attribute(so if the drills trains 3 attributes the limit is 540 for all attributes).The closest you are to that limit
the hardest you gain.