I've always had a fondness for bowazons so I want to make a ladder character. I am leaning toward immolation/fire for my main skill and guided arrow for bosses. I would use a holy freeze mercenary for slowing down enemies. Is this a viable build (I haven't tried any patch playing), and do I need to add a second elemental (freeze or lightning via javelin/spear)? Or can I get by with physical/fire? Thanks!