Using a r3 Ikaris was a lot less stressful for me than trying my 7* Surfer. With ikaris you don't have to do the sp2 for doubling incinerates (makea it easy to be rooted which makes it easy to lose the extra incinerates), instead you can just spam sp1s and never really worry about your incinerates falling off. You also gain energize from hitting Nebulas block with your light attacks. Once all 225 incinerates are on her, she melts really fast and despair means you'll never have to deal with her healing.
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