This can already be done actually! If you are using MV, you can use YEP Message Eval Text in order to make that formula calculation by grabbing the current active actor and accessing their params. Make sure to set Active Updating on Text Format Plus to true so you are seeing the most recent value on the card.
You can also use our Independent Card Variables plugin we have which stores variables on a card instance and has a text component which updates when those variables are changed. ICVs can also be used in Damage Formulas so you can probably achieve what you described using these.
As to Deck Editor and multiple types, it will exclude the Cards if they have even one of the types that is excluded. If that doesn't work for you, then you can use the Require Eval in the Deck Restriction Notetags to make a custom restriction that works with the configuraiton you want for your game.
Hope this helps. Let us know if you have any other questions.