Mourinho is a typical arrogant coach, which many people know. I think he is one of the best coaches out there at the moment but surely we will rarely see him coach any mid-table team, Real Madrid, Chelsea, Tottenham, Manchester United, Inter and Roma is a list of teams he has coached. Of course he coached a talented team more often than others, so he was quite lucky about that.
I don't think he can be as successful at Inter, Chelsea or Real Madrid. At Roma, he will not be able to achieve that success easily even though Roma are a good team in Serie A.
Mourinho's tactics are becoming obsolete, but he is not in a hurry to change something, he thinks that if he has achieved results in the past, then he will be able to achieve in the future. It is not easy for him with Roma, because he came to the team not at its best times. Yes, he will improve the team as much as he could, but for a better result, he need a strong squad, which Roma does not have, for this need a lot of money. Mourinho has always played defensively, maybe if he makes Roma's defense more reliable then they have a chance to compete for the top 4, but that will be the maximum he can do with this lineup.