what I miss in your post is "why" why you want those nerfs. since its hard to have a talk when you dont tell why you think that they should change? :) @Veara Titan
Alright, here's the why:
Alarte Ascendare: This spell really launches a player into the air, and it will for sure kill them (Possibly not if they have Feather Falling or Spongify) if the spell is Maxed. I say 22 blocks because it is ALMOST enough to kill someone, but not enough.
Confringo: This spell is weak at the moment. Right now, it does only about 3 hearts, and since regen is fast that's almost nothing. This is a Tier 8 spell, therefore it should do a higher amount of damage, surely more damage than Bombarda does.
Obscuro: Right now, a nonverbal Obscuro lasts around 7 minutes (I had Bob cast his on me, it's nonverbal). That's too long of Blindness if you don't have the Countercurse nonverbal! It's pretty devastating in duels. In addition to this, I recommend nerfing Nullum Obscurus also, to balance the 2 spells out, because right now, a nonverbal Nullum Obscurus can take out the blindness inflicted in 2 casts.
Mucus Ad Nauseam: I asked Liam about this spell, and he said his could last around 7 minutes. That's wayyyy too much Nausea for one person! The cap should be much lower, as this spell a) Creates a lot of entities if not picked up and B) Is very annoying to the player if the spell has a long lasting effect.
Lumos Solem: This spell is pretty cool and useful, but just doesn't do enough damage. It'd be great for it to do a little bit more, since it's Tier 6.
Phasma: Ah, this spell. This spell is a really cool spell overall, but it'd be amazing if this spell could be casted much faster. The 15 second cooldown in my opinion is ridiculous and should be nerfed down to something like 3-5 seconds. Maybe even no cooldown. The actual spell mechanics are great, and the amount of damage it does doesn't really need to be changed, but maybe it can do an extra heart.
Baubillious: So when this spell hits a player, the amount of poison it inflicts is perfect. What is not perfect, though, is the amount of poison a player receives if they step on a "Baubillious" block. If a player steps on this block, they get around 30 seconds of poison! That's a LOT of poison in a duel, and could be the overall game changer. It causes some people to keep running away until the poison wears off, prolonging the duel. Around 15 seconds of poison would be manageable in a duel.
Episkey: There are many Episkey spammers in a duel, and it isn't the greatest thing. Makes duels last a long time, which isn't good. I believe the cap on this spell should be 4 hearts, and not even factoring in the other healing spells that MIGHT be added to the server later on (Leigheas & Kuvuselum). If the cap is at 4 hearts, a player can't heal themselves all the way by casting the spell 2 times on themselves.
Sectumsempra: Looking back on this spell, and Liam's suggestion, I like the way Liam is suggesting, but I would like to see the seconds cap on that spell to be around 10-15 seconds, because if the person keeps "bleeding out" and they don't even know the counter-curse, that's just game over for them. That's too OP.
Deprimo: This is a cool and simple spell, and I'd just like to see this spell do more damage. As far as I know, the cap on this spell is 1 heart, and it'd be great if the caps was around 2 hearts, maybe 3 hearts, since it's a Tier 6 spell.
Immobulus: Now, I'm not 100% sure how this spell works, and I realize that lowering the cooldown might make the server a little laggy, but if this spell can have a lower cooldown, that would be great. 10 seconds is a bit too much.
Welp, there are all of our suggestions explained :P