AP Sona seems underrated, have people been playing it and finding success?

TLDR I go Arch Deathcap Sona (Zhonya's Mejais) everygame and it feels much stronger and better than enchanter items, it also feels surprisingly consistent (I go standard runes but greed for AP with absolute focus).

I haven't been active here for a very long time but I was curious about what people think of AP Sona. Just 2 weeks ago or so I was getting tired of losing games and feeling useless and I decided to experiment a bit with a new build.

I was surprised with the results because it felt consistently strong and has a lot of advantages over building "normal" / enchanter items - I would argue it's better. Sadly the split is almost over and it might be weaker next season, otherwise I'd release a guide for the build.

The purpose of the build is to reach high levels of AP as fast as possible in order to make your spells stronger and scale really hard all game long.

Runes: Aery / Manaflow / Absolute Focus / Gathering Storm + Conditioning / Revitalize + AH / AP / Scaling HP

Items:

- Core: Boots, Archangel's Staff, Dark Seal (sup item upgrade: Bloodsong)

- Mid to lategame items: Rabadon's Deathcap, Zhonya's Hourglass, Mejai's Soulstealer

In terms of item power, Archangel's remain the best 1 item powerspike for Sona with a strong buildpath offering all the stats she wants in the earlygame and a shield for self-peel. Followed with Deathcap most games which allows you to finish it in time (it's reliable if you build it second), or Zhonya's / Mejai's sometimes. All the items synergize really well and offer an enormous amount of AP + 2 defensive tools and extra movement speed.

Pros: more agency, more damage output, powerbudget is not W centric so you don't feel miserable against antiheal / shield reaver, huge damage to structures, game dragging forever always go in your favor because you outscale almost every champion, more selfpeel through arch + zhonyas.

Cons: much more expensive, most components after early are ~1200g, you heal and shield a bit less (not in a way that is significant imo and your sustain pre-fight is about as good), you won't have sofw and ardent buffs.

Here are my accounts for reference, I had a terrible split on my main, a bit sad I didn't find out about this build earlier. I am 24w 8l combined on the two accounts playing with this build.

https://www.op.gg/summoners/euw/Graceful%20Goddess-Sona?queue_type=SOLORANKED

https://www.op.gg/summoners/euw/Plomb%20Rouge-EUW

EDIT: I'm surprised people are so enthusiastic when discussing questionable stuff like fimbulwinter, RoA, or max R last Sona but building Deathcap is apparently really weird and probably not good okay