You should have enough Adam by now to be able to max out one of the tracks, whether it is the plasmid track or the physical, engineering or combat tonic tracks. Any of these will satisfy the requirements for this achievement. Personally I maxed out the Plasmid track so that I had a larger offensive arsenal at my disposal. Whilst the tonic tracks are handy too they are more passive perks/bonuses and so I figured they can wait a level or two more.