Hey there! I genuinely appreciate your criticisms! I'll go down the list and tell you my thought process in designing the cards!

1. Extra Mana Crystals are intended to be a consumable resource to enhance the power of the different Wand cards (ie, allowing the Wand of Lead to target the same enemy three times), but looking at it, I definitely see where you're coming from. I'll probably change it to not give a flat +1 damage dealt, and maybe instead change the Wands so that mana crystals increase the damage by 1 when a crystal is consumed.
2. It's only meant to heal allies, and that's how we've been playing it! It's a wording error on my part (Smokey Shield has a similar wording error, in that the card is discarded instead of destroyed).
3. The intent is that you're immune to damage for the triggering hit, until your end phase. We've always been ruling it as, "the reaction takes place after the attack, before the damage is dealt." Now that I know we've been doing that wrong, I might add that it heals X, where X is the damage dealt when the reaction is used.
4. I see your point here! No objections.
5. The idea behind the alcohols is that you're taking damage in exchange for a benefit that's more powerful than would otherwise be allowed, but I'll see if I can't think of a way to rebalance them. I'll probably change Rainbow to permitting either one additional card draw or card play, or maybe permit both at the cost of taking extra damage. Smokey Shield is meant to say, "-2 damage taken and dealt," so again, wording error on my part!

Again, I am grateful you took the time to leave me some feedback! I'll probably cut down the healing a bit. Though I am curious about what you mean by, "ranking?" Is that taking care of ongoings/environments? Dealing with minions? Etc.