Since i have a fire druid... i have to say that i haven't really totally lost to anyone... as in if someone does manage to kill me,i'll kill them many times over.
Most casters and amazons are pk.
I PK'd an absorbing bvc, and many other fire abs chars.
The key is that the fire druid does not only fire,but also physical dmg.
Wind druids,amazons,necros, most sorcs are all easy with Volcano since it sends them to stunlock. (only when casting it direclty under the oppnent though...) Usually 1-2 volcanoes is enough to kill a caster unless they have way too expensive equipment. (in which case they are still beatable,even pk'able)
VS melee chars i spam fissure and make them run inside it.
also...my equipment isn't that expensive... i haven't got any lifeskillers etc... not even a mara's. I PK'd a hammerdin who'se eq cost about 150 hr,whereas mine is about 14 hr. PK'd a wind druid who'se eq cost even more...
Also,do not make a shaman,i advise using no summons at all (except oak sage),but if you must,then use wolves. Since you need to max 5 skills and armageddon has 9 prereq's... doesn't leave you with much points to spend on summons
edit: stacked res is not much of a problem either,i killed an avenger pala that had 95 res +absorb + stacked.
This is the time where you use molten boulder (also count on armageddon)