There's a lot of old discussion about damage effects and the order in which they are applied, but I still find the situation murky. In particular, I'm not sure which of the old discussions have been overruled by later rulings. (I always get suspicious when a thread starts talking about Imbued Fire/Flesh of the Sun God, which has since been ruled not to work.)
So here are some questions.
(1) Do damage-type-changing effects take place in the order in which cards are played? For instance, if Ra's "Imbued Fire" is played before Visionary's "Twist the Ether", I would think the damage gets converted to fire, then to whatever Visionary chooses, while if "Twist the Ether" was played first, I would think the damage is always fire. Is this correct? I did find some people confused in other threads.
(2) When do damage bonuses get applied? For instance, suppose Absolute Zero (AZ) and Ra are out. AZ has played Focused Apertures before Ra played Imbued Fire, and then AZ deals some cold damage. Perhaps the cold damage gets the +1 from focused apertures, then is converted to fire by Imbued fire, then gets the +1 from Imbued Fire; or perhaps the damage type is computed first (and is fire), then there's only the one +1 from Imbued Fire.
(3) When AZ would deal cold damage to himself that is converted into healing by Null-Point Calibration Unit, does this count as cold damage dealt by AZ for the purposes of (eg) Thermal Shockwave?
(4) Can damage reduction get applied multiple times? Eg, say Haka has Ta Moko out, and Legacy has Lead from the Front and Fortitude out. Then a villain deals damage to Haka. Can this get reduced by 1 by Ta Moko, switched to Legacy by Lead from the Front, then reduced by 1 by Fortitude? Does it depend on the order the cards were played in?
(5) For effects like Fanatic's Undaunted, when do I check the damage amount?
(Text: "Whenever exactly 1 damage would be dealt to Fanatic, prevent that damage. Whenever Fanatic would be dealt 5 or more damage from a single source, reduce that damage by 2.")
(6) In general, I'd like to see an accounting of the precise steps involved in computing damage. I suspect the answers to (2) and (4) are both "no, that combo doesn't work", but why not? One algorithm I would know how to apply would be to have virtual damage floating around, modified by all cards played in the order they were played (damage increased/decreased, targets switched, type changed, converted to healing, etc.) But I gather this is not the algorithm?