Godhands

I've been playing RS every now and then (just came back from a 2 year break), but have always been F2P. Now I've been thinking about shelling out the five bucks and becoming a member, and one of the main reasons for that is the mini-games, particularly Barbarian Assault. The reward items from Barbarian Assault look pretty cool, and all I want to know is how easy is it to earn points in that game? I read through the Tip.It guide, and it seems pretty straightforward, but will it be easy to find other people to play with? And also, as a lvl 67 with 55 atk 62 str and 45 def w/ full rune, would I end up being a hinderance to my team? Any input would be appreciated.