Skills and Master Skills
You should max out all of these, always.
Basic Training (level 21 max)
Emergency Escape (level 11 max)
EX Skill (level 7 max)
HP Increase (level 21 max)
MP Increase (level 20 max)
Def Increase (level 17 max)
1: Madman on the Battlefield (17 second buff)
2: Spiral Strike (10 second cooldown)
3: Tornado Slasher (10 second cooldown)
4: Hurricane Slash (15 second cooldown)
Madman on the Battlefield and Spiral Strike is a nice combo. Increase your attack by 74%, then quickly hit Spiral Strike for the skill slowdown to cover your dropped defense. Tornado Slasher is another fast skill with a short cooldown to further benefit from Madman on the Battlefield. Hurricane Slash is the final skill. Its the fastest leftover skill and it hits plenty of times.
1: Meow Trance (17 second buff)
2: Thunder Dash (10 second cooldown)
3: Wind Spin (10 second cooldown)
4: Cat Frenzy (15 second cooldown)
In that order. Meow Trance lasts 17 seconds, so you can pull off a second Thunder Dash and Wind Spin while buffed. Spiral Kick Gets an honorable mention as it slows skill usage of your opponent. (but is also weaker than Wind Spin). You can use the same set for PVE because that doesn't matter all that much. Brainsplitter is somewhat nice when used after Thunder Dash, but the damage output is lower than Wind Spin when you take the recharge time into account.
1: Fatal Delight (17 second buff) / Vixen's Ambush (10 second cooldown)
3: Siren's Snare (15 second cooldown)
2: Heaven Bound (10 second cooldown)
4: Death Trap (15 second cooldown)
Fatal Delight is preferred, but you can use Vixen's Ambush if your critical rate is too low (basically if your valkyrie is weaker than the majority of players, as you won't make any crits otherwise). From there Siren's Snare is one of the few fast attacks the valkyrie has. Considering it stuns skills as well, it is the preferred attack to start off with. Heaven Bound follows as it can be used twice in combination with Fatal Delight. Death Trap is the final attack, again taken for its speed and amount of hits it deals.
DEF Increase (every level)
ATK Increase (every level)
Critical Rate Increase (every 5 levels)
Skill Cooldown Decrease
Emergency Escape Activation Rate Increase
Critical Damage Increase
Additional Damage Increase
Making your damage output as high as possible is a must. It is probably best to level Additional Damage Increase, Critical Damage Increase, Critical Rate increase and the leftover in ATK Increase. Upgrading Emergency Escape Activation Rate Increase can be nice for PVP and aid in getting the daily 55 Karat from Versus.
More coming soon!