In order not to nerf it but fix for other who feel it is in-balance.
1.) Add weapon swap like "W" in D2.
2.) Put a vision-able aura or something similar for RD Pack.
3.) Make reflect damage cant kill hero, leave 1hp at the end. like poison effect in D2.
4.) Change calculation to include RD damage + LoH + LS together, don't calculate RD then only LS. or LS then only RD.
5.) Change pet and sentry does not trigger RD, if they did, they should trigger LoH and LS as well.
the option (3) i don't think blizz will agree, the option (1) and (4) may give trouble to blizz dev lol
you can give a support or any constructive recommendation.