heh Perma swiftnes for WvW power necro is easy
1. Superior Rune of the Pack – set
2. Death Magic – 6pts
3. Soul Reaping – 2pts (Spectral Mastery)
and you have 48sec swiftnes from Spectral Walk with 48sec CD
http://gw2skills.net/editor/?fRQQBJUcTC4BQaQVA-TVQSAAw+DAA-w