Everyone who is raiding has heard of them. Snowcrows and their website with raidbuilds and recommendations what and how to play in raids.
Unfortunately that leads to some problems.
Almost everyone in the LFG tool is thinking that this is the "meta" and the only way to play, so the builds are just copied and the raidsetups too.
What people dont understand is, that snowcrows is a speedkill-guild and not the average random LFG raid. They know how to play their classes, what the bosses do and why and when they use certain traits or skill. Also their DPS is significantly higher that the DPS of the normal GW2 raider, allowing them to skip boss phases or mechanics.
With shorter phases you need lesser boon duration, less heal or even 1 less healer. You can sacrifice boon uptime and heal for more DPS to make the bosskill even faster.
BUT the average raid doesnt exist of 10 SC members, instead you will most of the time have people whose DPS is lower, who dont know their classes well, or you have a suboptimal raid composition or people dont know everything about the boss or people just make mistakes.
And then you have a problem, because boss phases are longer. Boons will disappear because boon duration is bad, group takes more damage because protection is suddenly gone, area damage is ticking all the time and longer as the phase should be or heal is not enough.
It also happens that CC phases take really long cause people dont use their CC skill or are just spamming all skills instead of saving CC skills. And then people go down and need to be rezzed and all of that makes the fights even longer.
All of that will happen in an average or random raid, but the snowcrows meta doesnt consider this. Snowcrows meta is made for a high-dps group that doesnt makes mistakes who is able to skip phases with dps.
As average raid, the sc speedkill meta is nerfing your own raid, because with it, most of the time, boon uptimes are short and heal and cc is not enough. And then people wipe with a normal raid, try again, wipe again and so on. But wiping 10 times with a speedkill setup is still slower, than killing the boss safe first or second try with a non speedkill setup were maybe the bossfight is 1-2 minutes longer.
Therefore i highly recommend for everyone who is not interested in speedkills, but just wants to raid to think about this. Bring higher Boondurations into the fight, especially for quickness and Alacrity you want to have 100% boon duration. Use Full Tanks (Minstreal Gear) for bosses who deal a lot of damage to the tank. Have one Healer for each Group with full healing gear. If the group still takes too much damage, bring a 2nd Banner Warrior and use all 4 Banners. If there are a lot of projectiles, use classes that have projectile reflect/block. If damage to group still is too high, use a 3rd Healer or get hybrid healers into the raid, for example condition necros who take the one big shadow trait. Even with full dps equip they can buff shield to 10 people then.
And always be prepared to compensate mistakes, because in a normal raid, mistakes will happen. With a speedkill setup a mistake is most of the time a wipe. But if you can compensate it with more heal, higher boonduration, aegis, stability, reflects or whatever there is, you will survive mistakes.
Of course Snowcrows dont destroy random raids on intention, but out there are a lot of people for who the snowcrows raid meta is like a religion they have to follow, even if they dont know why. And there are a lot of people out there who dont even accept anything that is not meta, but which would actually help their raid kill a boss. With such people most of the time you will just get flamed or kicked out of the raid if you suggest bringing another healer or a 2nd warrior or a necro for addclear etc. People only know "thats not meta" and thats it.
Also the sc meta makes people not think about their classes. They copy the build/traits but dont know what the traits do. And then they are surprised like "oh my skill does now immobilize/reflect/something else as well? Where did that come from?"
But the result of this is, that people dont know their classes like they should for raids.
So raiders out there, dont just copy everything from Snowcrows. You and your raid is not like them and will never be, so instead of copying their speedkill meta find out what works for your raid and adjust your raid according to your playstyle.