Yes I was a Blade.
I didn't use the "ratio method" but rather I just aim for, like, 50 Str and I'll just keep adding Str until it hits 50.
Aim for the desired stats, go up slowly 10 by 10 but if you suddenly feel another stats lacking, pump that right away.
Worked for me, but not sure if it will for others since you'll have to train til you level if you lacked some points of stats.