I always get the Malus but I usually wait with the imbues until I'm somewhere around clvl 75 or above. Usually I imbue Tiaras and Diadems in try for a good combination of mods, namely +skills, +life, resist all and faster cast rate. Sometimes I'll imbue an elite weapon if my character is in need of some nice damage, and hope for lots of damage, IAS and dual leech.