40 till 10
QS - Kudo's 2 u for posting and taking on conflicting instructors/techniques. There's been some good gen here that hopefully you can put to good use.
One useful rule of thumb, from an ex-airforce instructor, given to me early in my training was simply this - 40 kts till 10 feet will keep you on the right side of the curve on most days. That one rule has stood me in good stead from R22s thru to 412s.
It's a good ROT which works well for 'normal' approaches in most situations. Try it out sometime, starting the appr from a normal stabilised gate (e.g. 60kts @ 500'). Since it's quite a 'broad' ROT it allows the student to relax a little and get his head up, eyes outside and not fixate on the ASI/ALT combos.
One of the most common mistakes we find with newbies is they often end up in a high hover (OGE) 30-40 feet short of the landing spot, which is a bad place for them to be.
This rule of thumb can sometimes help by simplifying the approach process. Sometimes it helps to uncomplicate things!
Good luck!