I’m struggling on phase 2 of Rennala. Old and slow maybe but managed to take out magma wyrm and other annoying mobs like that Erdtree Burial Watchdog but she just constantly frustrates me.
I find she's a lot easier on agressive builds than on "safe" builds. She has no poise so she gets staggered by basically everything, she has relatively low hp, she often locks herself into long-ish animations. The main issue is she has very high damage output if you get hit by her stuff and her summons will block projectiles/just be annoying if you don't finish her fast.
Not sure what build you're playing but there's definitely things you can do to improve probably. Some random tips for her:
- Blood Grease(recipe in limgrave, materials in limgrave/liurna) will increase your damage potential a lot if using a semi fast weapon that can have grease. Takes like 5mins to grind 20-30greases. Bloodflame Blade(drops in liurna) can also provide better results if you can cast it. She has no particular resistance to bleed so you can get some good procs to burst her down. Works to speed up phase 1 too.
- As mentionned she has no poise, so if you have fast weapons like any dual wield setup, you can absolutely murder her. She will break away every now and then but keeping pressure ensures she doesn't really do much. Couple with status. If using slow weapons, look for R2 heavy attacks opening instead, especially jumping R2 since that lets you both reposition closer to her while not being too slow
- On her big beam, if you run at her straight away, you will be under the beam once she fires. She always opens phase2 with it so you can start with that. This lets you get several good hits in, such as charged R2 attacks for a stagger if you have a slower weapon, or stacking bleed status if using fast weapons. If using spells and such, I find it's still best to rush her to not have to time the roll(which isn't hard but if you fuck it up she'll chunk 3/4 of your health) and then cast at point blank. If using incantations for example Catch Flame is great to spam during that move or in general.
- She has high magic resist, so if playing a sorcery build, it's best to switch to a non magic spell. Rock Sling is best for her but can require exploring callid a bit to grab it(it's reachable at lvl 1 easily though as it involves no fighting if you're willing to google the location). Crystal spells are also physical I believe?
- The summons are timed. At first I was trying to kill them, but a better way to deal with them is just run around/block/play safe until they despawn. If she summons dragon or troll, she will use a voiceline, which tells you what to expect. Dragon always breath first(starting from its left, your right when facing it) then flies and does a dive. You can easily keep attacking her during firebreath if you're under/behind the dragon, but make sure you dodge the dive(running away far enough will entirely dodge it, otherwise roll into it). For the troll, it always starts by a big slam, so move away immediately if she summons it. I actually forgot what the other move is, but probably just some slow ass swipe, being under it will make it easy to dodge so run back in after. Bloodhound guy is the most annoying so focus on dodging him until he despawns. Wolves can be a bit annoying but aren't super agressive most of the time