What to invest in?

It's better to hold off currently since things are and can change rapidly...

Like mons over 3000CP loses motivation at 10% vs. 1% for < 3000CP so if you had a Blissey at 2999, that's a ton better than one at 3000...

I think this will change though since it penalizes people playing harder/better...You're now incentivized to NOT be the very best really...

Woe is me I guess with my near 3100 Blisseys...

I did power up my name trick Vap to be closer to 3k (it was in a gym in the old system while I leveled), but Eevee candy is common.

Tough about my +3000 mons but they can attack now. My stardust is maxing out my best attackers (Exeggutor C/SB, Machamp C/DP & Dragonite DT/O). Other than that, I see little use maxxing anything close to 3000, unless they are gym studs.

I started spending some stardust. Mostly on top attackers and high IV mons that could benefit a lot from a TM. Especially confusion / solar beam exeggutor. Maxed 1 and pushed another up 3-4 levels. (Like 24-28). Took my Tyrantiar from 22 to 27. I'm still saving most of it, trying to stay around 500k but I did spend about 120k in the last day.