(Evo - I would have thought that RANT was perfect for IMC rather than OTT. I know I hadn't a clue about tracking NDB's on fixed card ADF's - even with an IMC rating. An hour or two of RANT - with the right instruments selected - would have solved that problem).
RANT is excellent, no doubt - one of the best training aids that I've got. However, it makes it very easy to get hung up about HSIs, ADF dip, gates, DME arcing and all sorts of other things that you'll never need for the IMC.