Well it's up to you to decide what you are going to try and accomplish. I think agility would usually be the consensus. Train it up to 90-95% before next season's boost, or even train it up a full point and then back over to 95%, probably paired with vision. Just make sure you second cap it before auto level gains take it over 53.5. Even without training it up more than a point, you should be able to second cap with your boosts, then third cap it with the next four levels. If you are training it with vision you will be able to switch to vision/jumping next and continue training vision up to 53. Or you can train agility/tackling, third cap tackling first, then train agility/vision, third cap agility, train vision/jumping, third cap vision, then train jumping/stamina/confidence and soft cap confidence. Generally I like to get agility up asap but as it's too late for this build and since you have an obvious bias for strength/tackling here, you might as well go for tackling next I suppose, although you are going to roll over the cap regardless. After that you should split at least one piece of eq into speed and agility or maybe one each, rather than putting all of it into strength imo.
