Mulligans
General Mulligans
Try to mulligan for those cards cause they are expensive if drawn to late. Also keep bordclears and heal if you face aggro.
Deck works pretty well so far.
Keep all revival and damage spells. Either bring out Velen normal or via Shadow Essence. I just have Velen as a minion so u areguarantied to resurrect him. Heal yourself until you are able to nuke the enemy.