Not sure how other players do it, but being a new player, I unlock more nodes every few battles on my new mechs. The reasons being:
– I earn enough XP and C-Bills to do that every few battles
– nodes pay off immediately (as far as I understand)
– I did not unlock all nodes, yet.
– it's a fun activity to explore skill tree (and kinda 'upgrade' my mech)
– it's a short-term goal for me: to go battle to earn XP to unlock nodes
Currently, to do this, I have to do the following clicks, one by one:
1. Mechlab
2. Skills
3. Add SP
4. "+" button by the number of SP points
5. Ok
6. Ok
7. All desired nodes
8. Apply changes
9. Ok
Isn't that a bit too much, hm?

PS: and a shorter way to 'Skills' would complement this feature very nicely!
Edited by Yoho, 15 August 2020 - 01:05 PM.