yeah.. i'd hardly expect ANYTHING with kush in it's name to exactly be "energetic".
if you're looking for fast strains, C99 is famous for it's racy energy, though i've seen some reports on mosca phenos that can be stony and one grower has phenos that are downright skunky. i've only grown joey weed C99 & thought it's buzz was a lot like kali mist, but maybe not quite so energetic.
if you want guaranteed energy, just TRY sitting still on kali mist! i guess it's so speedy because it takes 17 weeks to get to harvest & wants to make up for lost time. i loved it when i was gifted a gram of original KM. it tasted just like smoking crushed red pepper. the 2.0 version only tastes spicy with some fruity going on, but the report i just read recently sounds like the buzz is still intact.
i was kind of disappointed that i couldn't kick back & trip out on tunes like i used to on columbian gold as the buzz is just too racy to be able to relax & concentrate and isn't really trippy, but more clear headed. instead of relaxing, i ended up cleaning my apartment including my fishtanks which i never liked doing all the while grinning from ear to ear and probably humming don't worry, be happy at some point. the buzz was kind of like shrooms with 10 cups of coffee, but no jitters. you want energy, you want kali mist. C99 is way more practical though and cheaper at that.
afghan kush is going to be knock you on your ass stony as both are pure indicas. NL#5 & big bud are both stony too.
even jack herer can be stony & skunky from what i've read, but not as much as it's twin sibling super silver haze which used NL#5 as the mother instead of in the father. if you're out to try a jack herer, i've seen plenty of great feedback on sannies' & sensi seeds' versions of that along with TGA subcools' trippy jack the ripper which finishes in just 9 weeks. i've also just read a review of jack's cleaner x querkle that desribes it's buzz as speedy & euphoric, so i bet jack's cleaner 2 (cleaner x JTR) is going to be pretty energetic too as querkle is more of a mid or indica than JTR>
my favorite strain that i've tried 1st hand, so far, is high quality seeds' haze x skunk. i wouldn't exactly call it's buzz racy & it does have just a little bit of lead eye left over from the skunk #1, but it's DEFINITELY motivational! the buzz is medium strength trippy with nice amounts of creativity and euphoria, but it's so motivational that it got me to quit drinking a 6 pack of 16 ounce beers a night cold turkey AND started me on an unplanned diet by just ignoring my hunger pangs and sticking to whatever i was doing that was more fun & keeping busy. i already loved the buzz the 1st time i blazed it, but made it my favorite once i realized that i lost something like 5 pounds in just a couple weeks of wake & baking on it and then lost even more weight by switching to an all carbs diet.
i love kali mist, but i like haze skunk even more because you CAN sit down on it & it's trippier buzz makes music & movies funner than clearheaded kali m and like any good sativa, at the very worst doesn't interfere with activities at all and even encourages them. it's just a better 24/7 buzz to me where kali mist is ONLY for nonstop activity.
if you want a nicely balanced buzz that's energy neutral, mandala's 8 miles high is super fun. it's buzz is mellower than haze skunk, but there's no stone or raciness in it, but plenty of happy playful motivation that loves music & dancing with less of the "don't smoke too much or it'll bit you on the ass!" edge of haze skunk.
really, almost ANY sativa is going to give you what you want with different degrees of clearheadedness, raciness & trippiness. like me, you're probably not looking as much for "the speediest sativa" as looking to stay the fuck as far away from couchlock as possible which MOST mids have and pretty much all indicas do too. even 75% sativa skunk #1 is too stoney for my tastes, but better than ANY crap i've bought on the street since the mid 80s in NY.
if you want to blaze something you can shovel shit all day happily on, kali mist is your best bet followed by C99, but if you want something that you can also relax on when that's what you want to do, haze skunk & 8 miles high will make you plenty happy and you should like TGA's gear too.