LWAMI improves some realism aspects of the game, but doesn't modify the core files of the game (per user agreement/terms), while RA is based more on gameplay modification, and does modify core files.
Running both is tricky, as LWAMI is deigned to allow other mods while RA is not. JSGME can allow both to be run, but only if the upgraded files from a RA install (over 1.04) are copied over to an individual folder within MODS (a folder created by JSGME) on a new fresh non-RA-modded install. LWAMI creates its own folder in MODS automatically during its own install.
I would consider Alfa Tau here as well, since it's a competitor to RA in gameplay enhancements and is also designed to be friendly with other mods, like LWAMI.
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