I think Lukaku can be a good option for AS Roma because at the moment Roma is being hit by a striker crisis due to Tamy Abraham and Dybala struggling with injuries. Apart from that, the Roma management, which is known to be very economical in spending money on spending on players, is also another reason and borrowing the Chelsea striker will be an advantage for both parties. And I'm sure Lukaku can get back to what he's capable of under Mourinho and the two of them will understand each other's characteristics
Lukaku appears to be being guided by Mourinho persuasive tactics towards AS Roma in Serie A possibly as a profitable loan from Chelsea. The move seems hopeful given that AS Roma needs attacking ability and Mourinho talent for developing powerful strikers. Mourinho conviction is probably strengthened by Lukaku dissatisfaction with Chelsea coach and the chance to excel in an attacking role at AS Roma. If Pochettino does not have any ambitions for Lukaku in his starting lineup this move might be especially useful. Although Lukaku might command a high price in the SPL his desire to make Belgium team may prevent him from making the move.