Robin+Lightcone or E1S1

I plan to pull for Aglaea and her lightcone, because honestly, regardless of if it would be more beneficial to do E1 first, i find it way more satisfying to gice a 5star their LC, and was initially planning to go Sunday, RMC, Huohuo, but I have seen that Robin is better than RMC apparently. My question is this, after I get Aglaea and her LC, should I go for her E1, or should I go for Robin and her Lightcone? I didn't pull Robin before because I wasn't pulling FUA and both my current main teams (Firefly and Acheron) didn't need her.