Personally, I don't think I'd pay £15 to get front-of-the-line privilages for 3 rides.

Last time we visited SW (October 2006) the park was busy enough, yet DH and I rode Kraken several times in a row. We had to get off and walk through the queue area again, but by the time we'd done all that, we were back to being "front-of-the-line" anyway.
We took DD on Journey to Atlantis for the first time during that same trip, with very little wait, and she said she never wants to do that ride again!
If you don't want to wait for an age to get into the Wild Arctic area, just do the walk through instead. My mum does this because she doesn't like simulator rides and usually by the time we meet up with her inside the attraction, she's pretty much seen everything already.
