There is more than one taxi company so you may have some choice and of course Uber and Ola are available. There are so many variables which none of us can control. Last week I had less than 90 mins from touchdown at T2 (domestic of course) to departure at T1 with checked in baggage, which I did not have to collect as same airline. I made it with much time to spare and as on transfer airline would have held the flight anyway.....and then the flight was delayed.

I have done T3/T2 to T1 connection many times (and recently twice a week), but if there are 2 options for the next flight and connection is tight then I book the latter. If I arrive at T1 early enough to get the earlier flight then most of the time I take it if it is available and not extortinate cost.

Be prepared to have to change to the later flight (flexible ticket helps) if things don't go to schedule. T1 departures is not such a bad place to sit and in my experience security is quick and organized.