Players that have over 90k power have spent arguably well over 3-4k into the game.

This will sound harsh, but why would the game provide you a way to catch up to those players when they've spent to reach those heights?
Eventually the game will provide a multitude of ways to climb power, however, that gap will remain. This is common with competitive free-2-play MMO's, especially Chinese ones. Just gotta accept that fact and move on.

You can take advice from experienced players. Spending 10$ a month comes along way (Monthly Packs)
You can save and provide yourself with power gains if you spent items correctly, Refinements during rebates, BA threads during rebates, etc. Spending coupons correctly as well.
You have to play at your own pace, you'll eventually reach a high point there it'll require Advance items, and from there it'll be harder to obtain items. (That's the wall that P2P climbed over to reach those BP's)

Being f2p and competitive is hard, you have to thrive for a goal that's actually achievable. Enjoy the game for what it is.

Yeah, but that's the core statement for this thread.

It's the "gap" between F2P and P2P, realistically, that's never gonna happen. Unless a P2P player is spending on ninjas and strictly that. However, the example you've provided isn't the case. It's players that are going above and beyond the mark to become competitive, it's those players that you shouldn't focus on because no matter what you say, or suggest. They'll always be ahead. The majority of the mid-spenders (including myself) are in around 60-70k BP, and I've spent quite a lot on this game. I'm not gonna be first on my server, nor am I gonna compete with the likes of Kozo/Leumas/Kahpow, etc. That's just not realistic for me. However, in and around my BP, for sure.

The game provides a lot of ways to farm medium items needed. Refinements and Threads are gathered mostly through Monthly Event and any event in between. The price is time and that's the real thing when it comes to this.

Man, I really wish players seen games of this genre to compare how less "P2W" this is lmao.

Ah, I see.

First Chinese MMO aye.
Makes sense.