i'll try to be as least biased as possible (placement within the tiers doesnt matter)
s tier:
g2: i swear this is not bias. even with the tejo nerfs, g2 is still an incredible team. valyn calls a great game, and any of them have a chance to have a life game at any time
th: woot and miniboo are one of the best double duelist combos of all time. miniboo's entry plus woot's cracked aim are incredible. boo calls pretty well, benjy can pop off and riens is him.
a tier:
geng: im still not fully convinced with ash (thats just me though), but even putting that to the side, they are great. texture and karon are still so good and even with some of their strats (ie. viper haven) being figured out, I still think munchkin can innovate enough to push past it.
rrq: jemkin might be the best duelist in the world right now. tejo nerfs hurt a bit with crazyguy cooking with him, but i still think they're so fine
xlg: rarga might be the best duelist in the world right now. you's util sets him up perfectly and some of the hero plays ive seen are incredible.
fnc: boaster. alfajer is still an incredible aimer, crashies has been flourishing in emea, kajaak has been on the up, and chron is still one of the best players. they might even have a chance to beat out heretics on friday.
sen: sorry sen fans. sen is great though. i won't elaborate or else i'll get jumped by sen fans in a dark alley
b tier:
mibr: aspas is not a baiter i swear. i feel that they have the ability to be very, very good but if one of their players doesn't show up, they just can't get anything done. artzin is still one of the most underrated igls imo, xenom is pretty good, cortezia can't not click heads, and verno has the fns revenge buff (as canada).
wolves: this might be tmv cope. i don't really know much about them, but they have pretty good stats to be honest. they also have funny names
prx: CHOO CHOO. im sad they knocked drx out but DAMN IT if its really nice to actually see prx playing well again <3 i used to be a big prx fan, but lost faith. something is still doing great on duelist, jingg looks great with the role swap, forsaken is the goat, d4vai and patmen are great with util as well.
bbl/tl: can't say much other than FORZA BBL!!!!!!!!!!! (if bbl make it, and have a good showing i would consider a, if tl make it they are probably going a)
c tier:
blg: i was not very optimistic with watching them against drx today. yeah, drx are a good team, but they didnt make the international, and blg are supposed to be the 2nd best team in china. it might have been a bit of an off game, but still. whzy is still cracked though.