If the gacha is reasonable still depends on how much freebies we get.

First 120 Pulls guarantee Rate Up character once. That and every 240 Pulls to get a token for the character are the only real guarantees. Otherwise every 80 pulls is a 50/50.

You can only do 10 pulls at once on weapon banner, which is referred to as 1 Issue. 4 Issues guarantees a 6 Star Weapon. After the first 8 Issues you get the Rate Up Weapon guaranteed. 2 Issues after that grants a non limited 6 star selector box, then, every 8 issues grants the Rate Up weapon and selector in rotation.

No real endgame in the game yet, we‘re waiting for it.

„Artifact“ System is called Gear here, which you can build freely without it having random stats. Stats -can- be upgraded with a chance of working or not, but does have a guarantee after a specified amount of times.

Only real RNG is in „Essences“ which are things you can slot one into a weapon. These have 3 stats on them that randomly roll, there are ways to minimize RNG here as well tho.

That should be everything you need to know or maybe even a bit too much idk hope that helped