Hey, when you've hit 80, you'll have enough points to unlock all your core stuff. Now that you're playing expansion content, you'll also be able to unlock all elite specs for all classes. Try and keep an eye out for HoT Hero Point (HP) trains. All of the PoF ones can be done solo and they all reward 10 points each.
Condi Specter is probably best for soloing champs, especially if running ritualist gear + scavenger runes. Can have a huge effective health pool with shroud and can heal itself decently with Consume Shadows and either Skelk Venom or the heal well. Being condi and ranged is great for champs bc you can kite them around.
Heart of Thorns still has some hero point trains in LFG if you have that expansion. Otherwise, central Tyria has a lot of quick ones, but you'll want to get the majority from PoF maps. The reason you want to do the expansions are because the hero points are worth 10 each (Heart of Thorns balanced this by having champions for the bosses you
The most important info revealed in the livestream so far is that you'll get ~400 hero points from leveling, and only about ~250 from skill challenges. You will need about 465 hero points to unlock all the stuff that exists in-game today, and a bunch more for your elite spec. So it shouldn't be too awful to unlock everything.
You won't get any Hero Points to use toward an Elite Specialization from using a L80 Boost; just enough to fill your regular Specializations. There are many ways to obtain inexpensive Exotic gear. But, gear won't help that much if you haven't learned the game.
Gyyf.