LordPhenex026
After reaching namek , he should first set out to Guru to awaken his hidden potential , which would make his power bursteven more ... After that he can train some more time with Nail , and also using the spaceship gravity ... (even if he adapted to max gravity,he can use weights inside the gravity to make training harder and more effective) ... fighting with Nail ,he will adapt to his rapidly rising power , condense combat experience , and maybe also learning some new tricks ... for example : * Telepathy & Mind Reading * Telekinesis * Better Ki sensing (Namekians' Antenna helps them , he can try to train his senses some more) ...etc maybe he can even learn the basics of magic ??? or make a wish to Porunga to teach him ???
he must first increase his base power massively during the trip , using extreme gravity even beyond himself , so that he can push his saiyan adaptable body to the most potential ... I expect him to handle at least 80X Earth gravity by the end of the trip (maybe less) ... goku could adapt to 100X earth Gravity in only a week ... this gohan has a power level similar to goku , and ki manipulation skills on similar level as well ,so in a time period of 5 days he should achieve similar results ... also , he has artificial senzu beans with him ,which can help him accelerate the process better than CANON goku ...