You can level it, put points in the tiered dragon slash and the buffs/stat raising skills, and continue leveling 30 levels without bothering about skills...
I'm level 79 or so after less than a day of playing, being spoonfed exp and gear thanks to the event, and the only stuff i have leveled up is crystalize or whatever, the 3rd atk mode, dragon slash 2, wing beat or w/e and gonna max the str thing and morph.
Not sure about the chain pull skill, i put 1 point in it to see, and most of the times it hits the enemy and they just stand where i hit them instead of coming towards me...
Should i forget about the dragon head summon thing? it doesn't seem really useful considering the stupid mobility this class has, with the air dash, the hookshot, etc. --- Give me my god DAMN TEA!
Mastery is generally what you want to go with since it's the first thing you're supposed to max.
But Kaisers seem to be a unique case, and Gigas Wave 20 and 30 (Kaisers 1v1 attack) are worth about twice as much as sword mastery books. At least in Khaini. --- http://i213.photobucket.com/albums/cc157/peekatchu/Other/phainopepla.jpg
I used Pressure Chain as my main attack skill throughout third, to be honest. It's fast, it gathers, and it's strong. --- Oh, youth... guided by the servant of the goddess... Unite earth and sky, and bring light to the land.