Conversion
+
Glyph of Shifting Presences
http://www.wowhead.com/spell=58647/g...ting-presences
(Combine Blood Presence + Frost Presence into a macro)
or
Death Pact
+
Glyph of Empowerment
http://www.wowhead.com/spell=159421/...of-empowerment
Conversion
+
Runic Corruption
+
Icy Runes
http://www.wowhead.com/spell=159418/glyph-of-icy-runes
Up to you really; either you want less damage receive over time or more healing-on-demand receive or more runic power regen.