I've tried with Elunes Grace and changing Magic damage reduction to negative value (eg. - 0.60) and also, tried with spell damage reduction (runed bracer) and set the magic reduction value to negative.. they both heal the units instead of amplifying the spell damage
I dont know... I just changed damage reduction to negative value, and added ability to the enemy units(in object editor, not via trigger) and it worked.....
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.