Yes, indeed it is. When it comes to clearing end-game content like Spiral Abyss, Energy recharge is quite essential. Energy recharge helps to get your character's burst back more often.   And that way, you're able to perform optimal rotations. I'll recommend you to have a balance on Energy recharge and optimal CRIT ratios. That way, whenever you need that quick Jean burst, you'll be able to heal your team members on time.   Energy recharge is more beneficial for healing characters. Sometimes, enemies deal a lot of damage, like that Maguu Kenki. Trust me, he one-shotted my Zhongli one time.   So, whenever your characters are low on HP, you can use healers' bursts to refill their health back. One secret tip, you don't take damage in your burst iframe. Shhh! That's how I survive critical enemy hits.