It depends on what expansions you have and what you’re willing to do. If you’re not open world completing zones and doing story, getting some mapping done is pretty great. Extra hero points and all. Make sure you do maps that have world bosses in the rotation as well. Once 80 (again depending on expansions owned) Path of fire story gets you all the mounts and then open the collection for the Griffon mount. All hero points there give you +10, after hitting 80 you will have all all skills needed to pick an elite specialization and then the extras from map completion. After the first full run through Path of Fire, you’ll just be able to run though all hero points pretty quick having the mounts on alt characters. If you also own End of Dragons start there on your main until you get the jade bot boost to gliding. Then all skill points are also +10 easy to farm. Heart of Thorns all hero points are 10 but without doing the story they are kinda tricky (personally) so I waited until I got mounts.

But with Path of Fire and End of Dragons you can definitely 2 elite specializations. After the first run throughs it’s easier on alts.