it's to bad that joey weed's grape pheno C99s are extinct, that would be an even better cross an i actually still have 2 of his C99 x blueberries left i'm saving for a fruits & grapes breeding session next fall. the C99 buzz was very clearheaded and energetic much like kali mist, but also having a grape flavor that would compliment it better as well as maturing in a fraction of the time of kali mist... there's a big difference between 45 day C99 and 17 week kali mist. i haven't tried the 2.0 version, but don't like the sound of it's spicy fruit flavor when the ORIGINAL crushed red pepper flavor was awesome, though not a good match for blueberry probably.
i liked the idea of breeding more energetic strains with blueberry to tame the stone, but kali mist is too specific a buzz for me... it's all about energy & euphoria with a clear head and not much sensory peaking. it's strictly and activities strain where a more rounded buzz lets you chill out to tunes and movies etc.
i'd say try super cali haze instead. it has a delicious grape flavor i like even better than blueberry and has a little bit of psychoactivity going on and i think it flowers faster too being a lowryder. not just that, but it smoked just like the 1/2 gram of "real" (?) haze i was gifted... better flavor, better THC profile & faster flowering. i actually did something very similar to what you're after with my first breeding session using JW C99 to spray everything in my 1st nearly complete grow harvested a little early. i only got about a dozen beans though as the SCH got stunted because of a kink in the root and ended up with just a single popcorn bud on a 4 inch tall plant. that's an even better match i'd bet. the C99 would boost the flowering time and tame some couchlock as well as keep a very similar grapey flavor that would just lower the taste a little instead of change it.
MOST of my C99 x C99 beans weren't as mature as they looked and it took a long time until i started finding anything viable and figure i have maybe 5% viability overall.
i also have C99 sprayed haze skunk, LSD, and just a couple hashberries that probably aren't viable as i mowed that down when it got too funky.
i REALLY hope at least a couple of the C99 x super cali haze are viable as i'd like to work that into a faster haze, but will probably try again next year using what C99s i have that are mature enough to pop as the grape pheno is irreplaceable or will see if i can at least get some (C99 x A11) x (C99 x C99) offspring this year though the A11 strays from grape flavor.
i hope to do better this year learning from last year's mistakes and improving with better gear like a 400w sodium to add to my original 400w halide and a little bit of homework & trying SCROGging. i want to use a C99 x A11 male to spray the same as well as haze skunk, thai skunk, jack's cleaner 2, 50% columbian gold, "amnesia haze", 8 miles high, C99 x C99, C99 x LSD, C99 x haze skunk, C99 x super cali haze, lemon skunk, masterkush, jack, auto jack, malawi goold, mulawi gold, mozambique poison and probably a couple others i'm not remembering at the moment and this time will stick to recommended flowering times or until the start of trichrome degredation, whichever comes first.
i hope i get something nice out of whatever previous crosses i did to preserve the genes. i REALLY want to try C99 x haze skunk and hope it not only flowers faster, but that maybe the C99 gets rid of that slight lead eye and the cigar wrapper flavor i'm not keen on. so far, the haze skunk is my favorite named strain after the real columbian gold i started out spoiled rotten on. C99's a better match than *cringe* afghani for a stone hater like me
