After reading discussions on this forum and figuring out my own plans with a new roster, I’ve come to realize there are several valid options for making the 5* transition, but each option has a different goal and time table. So, I wanted to spell that out here. Unfortunately, there’s not a straightforward / standard way to do this, plus it affects your 4* progress. Hence, the dilemma:
Champ Everyone - by constantly opening LTs and spending CP on Classics. This is the simplest option that most players take, but the reality is that it will take years to champion your first 5*. Years, not months. The good thing is that once you get to that point, you’ll have a steady stream of 5* champs, which gives you variety. This is also the fastest way to build your 4s and roster all 5s for PVE {Edit} but I would only recommend this to players who already have all 5*s rostered and not champed.
Champ the Newest - by constantly opening Latest and ignoring Classics. This is risky as you may not be able to max cover them before they leave the LL pool. Of course, it’s possible to cover them later with BH or 4Champ rewards, but that’s slow. You can obtain at least 1 cover of the Classics this way, but again, it’s slow. This is the fastest way to 5champs though, especially if you start the process with a mini hoard to ensure you champ the first set of 3. Then after getting those champs, your LL draw rate should increase, allowing you to keep champing the newest. This sacrifices the Classics for faster 5* progress. {Edit} I would only recommend this to newer players who don’t have most 5*s rostered.
Champ the Best - by hoarding until a favorable set of 3 is in a special store or in Latest. You can argue that only the top tier 5s matter and everyone else is a waste, which is why some people do this. It certainly slows down 4 progression, especially for new rosters, but the end result is having the best 5s and competing with the big boys. The downside is long periods of time with little roster progress. This method allows you to cherry pick the best 5s from Classics, but it takes a mountain of patience. {Edit} I would only recommend this to players who already have 5* Champs, so it’s not really a good “5* transition” option.
The Hybrid Approach - which is basically a combination of the 3 methods above. You could start by opening Classics to build your 4s and rostering Classic 5s, then switch to hoarding until a favorable set is in Latest, then break the hoard and champ the newest going forward. But you may realize you need top tier 5s to really compete, so you go back to hoarding for a special store or just wait for a new meta defining 5.
My conclusion is this: how long do you want to play this game? Do you want to be competitive in the 5* tier or just play for fun? Those answers should determine which approach is best for you. It is possible for new players to get 5champs quickly but they would have to sacrifice the Classic 5s to do it. I’m hoping that D3 will introduce a better solution to champing Classic 5*s.