I tried killing the Juvenile Scholars with Discus of Light but no matter how many of them I killed, her bubble didn’t pop.

Honestly, it's still a bit weird for me that in order to make Ranni happy we have to beat up her depressed mom...

It’s a shame they made it so difficult to find the key to get in to this place. I got bored trying to find it without searching online and got side tracked, so ended up killing Radahn before her. Then when I eventually found out how to get in (being OP) I had someone summoned and absolutely ganked her first time without me really seeing any of her spells. Feel like I’ve missed out!

As a first timer on a mage build, rock sling + wolf summons pretty much cheeses P2. You also have just enough time to do your summons and dodge roll before the first comet azur at the start of the phase. Just don't get too greedy or you will get smacked by the comet azur or star shower mid cast.

I finished her off fairly quickly on my latest playthrough, but the dragon summons was still active when she died. As I sat there clicking through the various rewards for killing her, imagine my surprise when the dragon breathed on me *twice* and killed me. So pay attention I guess, the fights not always over when it's over

One problem with a lot of bosses in Elden Ring is the lack of attack delay. It makes the fights feel more fluid, but also more frustrating. For Rennala it's especially so, because she can just spam spells at you--most of which are homing.
My advice? Poise break or bust. Get a weapon that can shatter her stance so she can't let off spell chains.
If you don't have a build around that, try Banished Knight Engvall. He's tanky during the early game and does a lot of poise damage with his halberd, with the added bonus of getting to watch him give children the people's elbow during the 1st phase. If you can't obtain that, the Lone Wolves summon also helps thanks to their staggering effect.

Blood loss also works quite well, from what i've heard. Bloodhound's fang or a greatsword with Bloody Slash from the Fort Haight questline should do the trick.

Cheers, and happy godslaying

Not sure if over leveled, but I just brute forced my way. Opaline Hardtear. Golden Vow, Magic Fortification, and Flame's Grant me Strength. Used a mace +14 and banished knight armor with a brass shield +7. I had almost 70% magic resistance and 65% or more physical. Wild Strikes melted her ridiculous fast in the first phase. Second one I just charged her and again Wild Strikes. I am level 70 currently, but a more balanced build. 25 Vigor, 20 mind, 25 endurance, 21 strength and 25 faith. I still beat her *** stupid fast.

This boss single handedly ended my mage run. I put all of my flasks into FP for this fight and still barely had enough to beat her...in phase 1. Then Phase 2 started and I realized being limited to pretty much a single damage type might not be the best strategy to enjoying the game.

I really like this boss. I don't know if she's as easy as people say. I find Godrick much easier. With Rennala, you can kill her really fast, but if you mess up once, you're dead just as quickly. She's a mage, so of course she's a glass cannon. Though I think they should've made her disengage moves a bit better and give her a guaranteed summon in the second phase. But I can understand why they didn't, I imagine this boss can be pretty annoying if you're new to Souls games.

Walked up to this ***** on NG+ as a level 190 fire-damage-based glass cannon build with +10 Blasphemous Blade and Erdtree Seal. Won in 25 seconds by spamming the AoW. Never laughed so hard in my life.