Lol, as if the Ch 53 or even the Ch 47 do other things. They do the same heavy lift of machinery, of crashed aircrafts, of cargo supply, of heavy howitzers..., because all this belongs to the heavy lift role. Only because the Mi 26 is the most capable one, doesn't suddenly bring it in a special class or special role, or is this a skycrane too?
Trying to creat fake arguments?
The rescue helicopters (Dhruvs, Mi 17s and privat helicopters) were operated from main air strips, from which they started to their missions and returned. Logically, these main bases are the places where the helicopters will be refuelled, or repaired, just like that is the place where people were evacuated by the Mi 26 and later the C130J. So your questions hardly makes sense, since the fuel, the fuel bowsers and the fuel barrels were only transported to these main air bases and no, there was no other way to refuel the helicopters (otherwise they would have done it don't you think?), because the helicopters were neither air refuelable, nor do we have the capability to refuel helicoperts by a tanker aircraft. Also the IAF does not seems to have procured the removable fuel tanks, that the Mi 26 can use to be as a forwarded refuelingstation, be it for helicopters at such air bases, or for armored vehicles:
So we didn't needed another helicopter to use them at smaller helipads in rescue missions, but one at the main air bases to provide the necessary logistical support, that keeps the overall operations running. So even if we had the Ch47 now, it would be needed to bring troops and cargo to these main bases and to evacuate the a greater number of people from these bases, especially when no fixed winged aircraft could be used.
The next role is to support the road re-construction operations, transporting trucks, JCBs or material to that is needed. Not to mention that both, the Mi 26 as well as the CH 47 would be used to recover the crashed helicopters.
All these are logistical lift roles and not the shiny special ops that the US Army might do with the Chinook, but that's the way it is. The Chinook has it's design advantages in certain missions, while the Mi 26 has it's design advantages in other missions, but all in the same heavy lift roles!