Personally, I've dropped wind walk from my skill tree and use guarana candy instead. Agi up gives higher speed than wind walk. It'll cost you 6-7k each, but I find the skill points saved and the increased movement worth it.
I don't really like element change traps because the trap only works on 1 enemy (maybe for WoE or PVP) and you can't put the trap beneath the enemy directly. Boss is also not affected by the trap, so I don't find it useful.
Trap Research 1 and Electric Shocker 1 are good; +220 Max SP and the ability to AoE snare the enemies (although its pretty hard to catch all the enemies in 1 trap).
If you're building an auto-attack / AS build, why not get warg skills?