How are people champing 4s so fast im at like day 330 and I have a few 4s with like 1- 2 covers each.
It was over a year before I championed my first 4* but I was intentionally softcapping and drawing from a much larger pool... In general its gotten easier and easier to get chances to pull 4*s.
I would seriously consider revising your goals though, the game is not designed to allow for you to champion all or even most of the 3*s before you champion a subset of the 4*s.
A large majority of the 3* tier is vaulted away and unable to be obtained by pulling your normal tokens, same goes for the 4* tier, so you're best off getting used to the idea that you wont be getting the majority of 3*s in any significant numbers before you get in a cover crunch with 4*s you have to champion or loose.
Theres about a million posts on the topic of vaulting, you'll find it all, people telling you this is better and you shouldn't be concerned about wanting those heroes, and people saying its worse, that you wont be able to get the heroes everyone else already has, and you wont ever get the new ones to high level before they go into the vault.
One things for certain though, anyone starting now requires much less effort to get a 4* champion than at any other time in the game.
I started playing on November 17, 2016 and champed my first three 4*s on May 26. That's about six months. but I could have done it earlier had I not chosen to finish champing my 3*s first or champ multiple 4*s at the same time.
But I play a lot - full clears on every PvE, ca top 50 in every PvP, plus ISO mining a number of lightning rounds. I'm also in a pretty good alliance with players who buy HP fairly regularly. I have also been a VIP since not long after I started playing and spent a good deal of money when I was in the 2-3* transition (not so much since then). I do not farm 2*s, however, nor do I share rewards with Facebook friends. And I had most of my 3*s champed when vaulting was introduced, except for a handful that had ca 9-12 covers (and I was able to use BH to finish off those). I also had all but about three or four 4*s rostered when vaulting was introduced, which helped in terms of being able to do BB every day (and once again, I was able to use BH to roster the few vaulted 4*s I was missing).
My first 4* champ was around year ago so it was something like day 800-850.Since that day I constantly champ one 4* character each 2 weeks.Today on day 1181 I have 29 4*'s champed.