I believe you have missed a lot of refine and charm

Check your "POWER UP" red buuuuuuutton near your stamina and see what you've missed.

On my alt, currently at level 65 and stopped playing cos that server is dead a few weeks ago. I had 23k bp on current team.

I'm too strong in plundering, GNW is one sided. My main has 2 level 7 refine from previous rebate and most of them in my team are already level 4 some 2 and 3.

So by the time I hit lvl 70 I should roughly be at 30k, then start slowly holding your exp at lvl 75

Stack all your power up such as refine, keys, charms, threads and use them during event.