Frost PVP

Can some 1 help me with this macro i made and tell me if it can be a working macro for frost dk pvp?

#showtooltip
/targetenemy [noharm][dead]
/cast [combat] Anti-Magic Shell
/cast [combat] Pillar of Frost
/cast [combat] empower rune weapon
/castsequence Obliterate,Frost Strike,Obliterate,Obliterate,Soul Reaper,Howling Blast
/cast Howling Blast
/use [combat] 13
/use [combat] 14