Velerin, you were dead right about bull elephants when soloing that camp, tyvm!
Life, I just leveled another shaman up through the 20s, so here's my take on it. That med-dancing strat I outlined earlier in this thread works really well. Get yourself a runewood great staff or higher damage 2hb, pull with affliction, hit mob when it gets to you, cast root, take another swing and back off and sit down. Then stand up and whack it after each med tick. Nuke when it saves you from having to cast another root. Things get better for you at 24 with regen and a higher dps dot/nuke.
To Lorian:
http://wiki.project1999.com/Woodsman%27s_Staff maybe?
The result you saw wasn't a hybrid thing, it's a twinking thing. Probably had decent haste and a fungi. At that level a shaman could achieve the same or better results with a GFG or PWC, haste and fungi as well. At that level the ranger's only real advantages afaik is double attack; it's not til 35+ when he gets riposte and 40+ when your combat skills cap and his keep going. Defenses cap at 200 for both. Meanwhile shaman gets regen at 24 and spell haste at 29.