Not a super expert on Aruba MAS (Mobility Access Switches) Switch Series and the ArubaOS network operating system they run on BUT, given that ArubaOS 7.4.1.10 is just a patch release, I'm quite sure that you can update directly from ArubaOS 7.4.1.8 to lastest (the 7.4.1.8 is not too far from the 7.4.1.10).
In any case please read the relevant ArubaOS 7.4.1.10 Release Note (especially for (a) new features, (b) solved bugs and (c) update procedures and best practices).