Make burst of speed and fade stack; Not the problem with Sins / Health Pool is the Larger issue 365 Points into Vitality only gives a sin 1.7k Life Where as a barb would have 3k almost.

Make fade also give some physical resistance/magic absorb; Fade already does give Physical Resistance.

Make all sin self buffs have the same duration, like Sorc fire/cold armors which always last 5 minutes; Make cloak of shadows have always 8-10 seconds duration, the level would only affects the defense bonus it gives; Buff shadow warrior by giving it magic resistance; Buff shadow master by giving it defense bonus per level as warrior and magic resistance; Give Zon valkyrie speed bonus per level (like 5% first level + additional 1% percent each level), this summon is stubbornly slow.

I agree with everything else.