wc is good choice.but i think that especially a tyrrant after he hits 61 would be more than ok with a pp.
better than wc.pp also has g.might haste as wc and zerk too.
u don't really need that much vr since i suppose (or recommend) that you will be using nightmare light.so u will have 3% vr already.and with the dmg output of a tyrrant you 'll be xping like hell.