When you save different decks, you should have access to all the cards (as if no other deck existed!)... I don't want to dismantle one of my decks for a card I have to make another deck, then remake it every time I switch decks - otherwise, whats the point of having multiple decks saved?
Keep moving and most mobs can't hit you. Hold down the mouse button for auto attack, tip all xp into def, small amount into life, small amount into mana and the rest into dext... attack and speed are arguably a waste of time. speed for obvious reasons, attack because it's better to have the garranteed increase in dmg from dext... you might come across a boss with a high def and you might as well have 0 attack ;o)
So sorry, I had to give this game 1/5 because it wouldn't let me restart from scratch - I had to close Internet Explorer down during some fights and when I started the game again, the mobs were gone and I got no XP. Then I got to a fight where I was too weak because I hadn't captured any extra mobs or levelled my main character. Incidentally: If you want to skip a fight, just close and reopen the browser ;o)