Multirip is for 8 color printers where you take 4 cmyk on each side of the printer and dedicate one side to sublimation and the other to pigments, or perhaps screen positives with black inks. This is called "Hybrid printing".
There is 1400 Mulitrip support but with 6 colors you get CMYK and the the other 2 slots for black doing screen positives.
You only need RIP software with large format or if you are doing hybrid printing with small format.
With your existing software you only need an ICC profile for sublimation, that should be supplied by the ink supplier or you have to have one made.