For those of you who bag fireballs.....would you also see a slot for a resistor? Or vice versa?
TL;DR: Grab a Fireball.
Started replying the other day. Deleted. I think I'm ready:
I don't see any overlap.
Haven't thrown a first run Resistor, but I think your assessment that the current ones are mellower is probably correct. Both the Resistor and Fireball are listed at 0/3.5 but my Resistors will hold a backhand turn and straighten, which is *not* what the Fireball wants to do.
The Resistor still has a stronger finish than any other MVP family 6.5 speed, but the current run's probably more of a -0.5/2.5 than 0/3.5. It'll skip hard left, but it'll also do other things if you tell it to clearly. Point being, one is most definitely not a longer version of the other.
Between 6.5 and 9 I'm carrying a pair of Hokom Craves, a pair of Servos (one original, one current), a pair of Resistors, an Insanity (having finally retired a lightweight right turn specialist), three (!) Wraths, and a Fireball. The Wraths were a bit of an accidental splurge. I do like having good things in pairs though. All in the 160s except for one of the Craves at 172 or 3.
To my eye/hand, the Fireball is a utility FH disc (unsurprisingly, not unlike a stout Firebird): if I absolutely need to get right after a bit (or I if I need a pronounced FH flex), it's the one. If I want something a little more accommodating for FH or BH at that speed, it's the Wrath. But the Fireball will tell you what it wants to do where the Wrath's more likely to listen.
All that to say, I think MVP's done an exceptional thing in creating a real palette of colors here. Maybe not in the same quantities (if needed, I could easily go one per), but there's a legit reason for bagging each of the molds above, something that each does better than the others. It's not night and day, but it's not super subtle either.