Questions about RMX tools & macros

I had a look at RMX and find it useful specially RMX slant (keeps tangents perpendicular), scaler and axis. I'm wondering if RMX is necessary and if any of you using it find it useful if so giving an example of a difficult situation where it made sense to use it would help. I'm trying to keep my workflow to just illustrator and fontlab, no plugins/macros, etc but there are all these other tools and scripts out there that makes me wonder if I'm missing something. Are there any essential tools and macros that would be useful to run in FLS for Windows, if so which?

Just FYI I'm only sticking to the basic Latin set for now and in the future maybe no more than two weights for a typeface. 

thanks!