remember this is my opinion so its not official or anything lol but lmk if you have any objections song is happy journey by Yu-Peng Chen (from genshin)
Why i put each reaction where they are: -HYPERBLOOM- It has a x3 multiplier, which is the highest out of all, and it scales w elemental mastery and character level to it is very easy to build cs you don't have to worry about crit stats just spill all em on an electro character and you're good :p -SWIRL- You can literally create machines with this reaction. If the vv set didn't exist, this reaction wouldn't be nearly as good, but you can shred enemy res w an onfield or offield anemo character, and stack em to increase swirl damage. the vv set not only allows you to shred elemental res, but it also increases swirl damage by a whopping 60%!!! if you stack em w the vv set on an anemo driver like sucrose then pair her in reactions like electro charged (offield) the team will go crazy. BLOOM- Its basically just hyperbloom but not as good. You have 4 slots to put in hydro and dendro, (usually go 2 hydro 2 dendro) then make a lot of seeds to explode. it has a high multiplier of x2, which is lower than hyperbloom but for hyperbloom you need an extra electro character. SPREAD- This one is basic, you just pair quicken w dendro to boost dendro damage by a lot. pair this with swirl, and the fact that it can crit and you get big damage numbers AGGRAVATE - Its just spread but electro damage is boosted, and the dmg multiplier isn't as high. You also need to apply electro to an enemy affected by quicken instead of dendro. VAPORIZE- Its a simple, straightforward, and decent reaction that does either x1.5 dmg or x2 dmg depending on the order you apply hydro and pyro. Its good, it can scale off em, and it is an easy go to reaction if you want numbers. MELT- Literally just vaporize but with cryo. ELECTRO CHARGED- The multiplier is relatively low compared to the other reactions, but it makes up for it with the insane AOE this reaction has. It does insanely good with multiple enemies at the same time, and it is a good idea to pair this reaction with a cc anemo unit like jean, sucrose, kazuha, etc. to further boost the AOE. OVERLOADED- This reaction is really good because of its high damage multiplier (and cheveruse), but the biggest downside is that this is considered a blunt attack. This means that it knocks back lighter enemies making it harder to attack them, so its basically horrible in groups of weak enemies. Oh, and a plus i guess is that it absolutely shreds enemy shields. BURGEON- This does have a good multiplier, but it has two downsides. One, is the fact that it also damages the player when he seeds explode, so that means that you basically have to have at least one healer. The other downside is that the AOE can be quite limited, as the enemy has to be in the blast zone of the seed otherwise it is literally useless. FREEZE- Awful damage, but its a decent paired with crowd controllers. This reaction is only really good with the blizzard strayer set, and that assumes that you can freeze every enemy you fight. Bosses cannot be frozen, therefore only half the 4pc passive is useful. without blizzard strayer, this reaction would sucl. BURNING- This has a very low damage multiplier, but the DOT (damage over time) is very fast. Even if you stack a crap ton of elemental mastery, it still does very low damage. This reaction has really niche setups though, like utilizing burning to maintain a constant pyro aura to reverse melt. (example team i saw was burning paired with chongyun and plunge diluc having diluc use chongyun's cryo infusion to reverse melt) SUPERCONDUCT- Physical teams are basically forgotten, and it basically has the same problem as burning. Even if you build your characters really optimally, there will still be better reactions to do. But if you really wanted to play it, you still could. CATALYZE (or quicken)- This reaction is literally useless without spread or aggravate. CRYSTALIZE- It's crystalize do i even need to explain. In all seriousness though, crystalize creates a shield that scales off em, but you can just play a character that uses a shield over this reaction