AP Sona support, Sightstone or no Sightstone?

As someone who plays a ton of AP Sona I find myself asking this question

I tend to only buy it in ranked games just to appease people and stop people from pointing out the support has no sightstone so they are inting It's not that I dislike warding, I play a lot of supports and always get Sightstone on them (even LUX support) and I know how to ward well, it's not that I hate the item, the problem is Sightstone on AP Sona support and how annoying it is for her to buy.

AP Sona is great, she's like a carry support who literally carries the game through sheer damage and insane healing when she snowballs, zooming around the map at a constant 600ms and 1 shotting squishies. But to get that ball rolling, you need damage and you get a MASSIVE chunk of damage from some component items, like , I also personally pack a corrupting potion because it essentially doubles my laning time before having to recall (what is very powerful in this destroy bot meta) having to fit a Sightstone in this array of items causes problems, such as needing a full 2150g to get a Lichbane and making future items a pain in the ass to build, I would probably build the Eye item to have vision covered but it has such pitifully low stats for Sona to make use of that you may as well just get a Ruby Sightstone instead and sell the Frostfang, and the Frost Queen Claim active is extremely good for AP Sona as she can rush people down and burst them with the active very easily. It also prevents the very common situation from happening as much, you know the one where you ward and Kha'zix is in the brush so you die like a bitch.

I still ward in my AP Sona games, I even inform my team and if they put up enough resistance I will give in and get the Sightstone they wish me to get, I was wondering what the general consensus was about this.