Well, I don't know if you need an entire "kit" to mount a scope properly but one tool you DEFINITELY need is a tool for checking ring alignment in all planes. I have a 1-piece tool which consists of a length on very thick walled 1" OD aircraft grade aluminum with slots machined into it for making screws accessible. The other type is 2 pieces with a point at one end of each piece.
Why do you need these? If the rings are not aligned correctly, the scope will actually flex when mounted. This leads to ring marks on the scope's tube, irregular operation of the scope's adjustment knobs and the loss of the scope's ability to hold zero.
Can you get the scope on the rifle without having the rings aligned correctly-yes. Will your scope work correctly and not be damaged-no.
There is a reason why Brownells and other gunsmithing supply houses sell base shim materials, ring lapping kits, etc. The reason is not just to increase revenue. Do you need a bunch of special tools-no. Do you need one or two-probably.
Bruce