I'm the greedy one, I hope he aims at 32, for the AO seedings
But realistically, Top 40 is very achievable. But it's also impossible to predict, a lot will hinge on his luck. If he draws top seed in R1 for the remaining tournaments, that would be it. I hope the draw god has mercy on him
He probably will need to achieve at least one QF at one of the remaining masters (Shanghai or Paris). Which obviously is possible but depends on the draw.