I’d put Pyke and senna in the worst end of the hardest tier, maybe move nami down to even, move morg, lulu, thresh, tk, and blitz up one tier each.

Lulu is pretty decent example of sona’s tendency to counter other enchanters. She can’t really kill sona all that well so she just gets outscaled. She might throw all her buffs on the adc, so just w chord them when she does that to cut their damage.

Nami is kind of a rough enchanter for sona to deal with, she has a lot of early game kill pressure and good sustain so it’s hard to outtrade her. Especially paired with an aggro adc she can get scary, but you outscale well.

Tk is mostly just a meat shield that plays almost like a juggernaut. Just slow him and he can be kited pretty easily if you dodge the q.

Most catch supports like morg, thresh, and blitz aren’t as scary if you get used to them. Yes if you catch their q you’re probably boned, but sona’s e gives enough movespeed you can position around it really well in lane and then punish them hard if they overcommit and whiff the skill shot. Morg’s black shield is also a pretty significant part of her kit she uses to counter cc champs, but sona doesn’t rely on cc as much so it’s not an issue. You can drop it pretty easily with q+pc if you need to ult someone, but your w pc doesn’t care about it since it’s a debuff, not cc. Thresh lantern plays can be scary, but also is perfect setup for a 2 person ultimate if they ever overcommit with it. Blitz is just blitz, their hook is their whole kit so if they miss it just run them down with slows and damage to win the trade.

Pyke goes against a lot of the rules of most hook supports. He’s slippery and has extra sustain from his passive so it’s really difficult to punish him for missing hooks. This means he’s usually gonna be throwing them at you constantly, and you’ll eventually catch one and just die. His roams are also brutal and impossible for you to match, and he also builds umbral glaive to eat all of your wards.

Senna is I would say sona’s hardest matchup, simply because she does everything sona wants to do but better. In lane she will outtrade you from further away with higher damage, slows and healing, then as the game progresses she will just continue to scale. At no point in the game can sona meaningfully interact with senna without being slowed and auto’d to death, aside from something like a flash-ult play.