hi darmestres. Welcome to nodeka. Well i won't recommend enhancing. as it take more platinums as a normal training would.
I recommend you to remortalize to the third tier as it'll give you more spells/skills and as well increase your stats. Plus you'll be able to purchase crafted eq. When at the 3rd tier then start to train, unless you have a disgustingly pile of plats to spend..well then you can go enhance :P
I'm not a pro in valkyrie,
so imo stats to train in terms of priority would be speed,willpower,dexterity,agility,strength,constit ution,wisdom, and last intellect.
I might be wrong but that's what i think it should be.
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No2 Review