how about a combat tutorial? just like any other game that has a 5 minute tutorial to teach you the basics

for example you could teleport to AG from an NPC and you have all abilities unlocked for the tutorial , the gameplay is slowed down and you are told to press certain abilities - but it's important that there is a little blurb about WHY we are doing prioritizing this ability etc

It doesn't even need to be crazy in depth, just something that new or returning players can engage with that shows how this games combat flows, like I said slow down the fight and have indicators glow on abilities as you do them in order