The long debate of everybody wondering who is the strongest Winx club memember. Since the series has had multiple reboots, I want to focus solely on the seasons that were the most coherent and understandable. So I hope you guys are ok with my reasoning I like to say things to make them understandable and walk you through my thought process.
I remember once in season 3, they all fought Bloom to try and find weakness in the dragon fire. Stella's attack was easily beaten by Bloom, and then when Musa channeled all of her Winx into an attack, they thought it was going to work, but Bloom broke out of it in a big explosion. All three fairies (Musa, Stella, and Flora) were all knocked down and out of the Enchantix state, with that attack from Bloom.
Even Though Bloom's enchantix had limitations, like she can't shrink like the others, it's safe to say she's the strongest, because everyone in the show constantly says how strong she is and that she's the strongest in the group with her "rare" power.
Stella is really strong, but in season 2, if she doesn't have sunlight she looses her power. In season 2 only the strongest of the fairies could go into Shadow Haunt which ended up being Bloom, Layla, and Stella, so it's safe to say Stella is in the top 3. So the top 3 fairies are most likely:
Though Stella at her top game does seem to be more powerful than Layla, none of the other girls have a power draining moment (that only one of them experiences) but Stella, leading me to believe she's slightly less powerful than Layla who joined hands with Bloom to close the Omega dimension and lasted the longest in Shadow haunt.
But speaking of the Omega dimension, Techna was the only one who had a tactical enough plan to close it, that both Bloom and Layla didn't, because of that she's probably right after the top 3, because even members of the top 3 including Bloom could close the Omega portal.
Musa and Flora (who are my 2 favorites) are probably the least powerful, but since Musa's attack that I mentioned earlier was enough to hold Bloom, I feel like she's more powerful than Flora. Flora had a tough time just trying to save the flower in Pixie village, though that could've just been a confidence thing. She also couldn't reverse the spell on Merta by the Witches for nearly all of season 1. So because of that I would definitely say Flora is the weakest. Musa is kind of a wild card because she did seem more powerful than Techna in season 2 when she was one of the last ones to be defeated by Lord Darkhart (or whatever his name was) in the finale. Musa also almost defeated Bloom in the enchanted duel I mentioned earlier, while both Flora and Stella's attack don't even stop Bloom.
All that said my list would be
With Layla and Stella being interchangeable, because I link Stella can be stronger than Layla if the situation demanded it. She's also been with us the longest, and she guided Bloom into the magical universe, so as the audience we perceive her to be just as powerful as Bloom, if not more powerful, because she also repeated a year, so she's a year older than the rest of the girls, though she is no longer stronger than Bloom, she probably could be stronger than Layla. It also brings the episode where she was the only one with Winx power left while all of the girls were in the Omega Dimension with no Winx left.
Layla and Stella in the series also have the strongest convergence powers together, I don't know if that's because of the friendship arch they went through in season 2, but in Season 3 when they both do convergence at Cloud Tower trying to free Ms. Griffin, it's almost as powerful as Valtor's original spell, so they are definitely second to Bloom. Layla's power never drains though, while Stella loses power when away from sunlight and Bloom is very weak when facing against the water stars, both of which Layla/Aisha (and the other girls) is immune to.
I also think that strength depends on season, because in season 1 Bloom is easily the weakest, she can barely transform, and would get defeated easily. In season 2 I think Stella is not as powerful as Layla for my reasons before, but by season 3 I think Stella definitely could be more powerful, because she goes through the the most trials as a character, so you could view that as the creators showing that she is very powerful. As of season 3 I think my list is pretty reasonable.
So tell me what you guys think, I'm curious. I know it's a really tired question, people have been asking it on the polls since the club started, but I want to make a more definitive list based on things that actually happen in the series and not just solely what the creator says, even though we probably should take some of his word for it, especially on Bloom since she is the main character and all. Yeah, so I hope you enjoyed or at least don't hate the ideas I have!