Don’t think there’s any hard and fast rule, but I’ll share my perspective as a p2w player of 3.5 months: (note the p2w part)
- Built up first rainbow team of 4* to 3/60 and hit mat wall
- While waiting for 3* mats, built up several rainbow teams of 3* (great for tourneys and for war cleanup) and continued with 4*s to 3/60
- Slowly leveled 4* to 4/70 one at a time as the 3* mats trickled in, while continuing to build up my 3* and 4* bench
- Leveled Telluria and Ursena to 2/60 when I pulled them in March since they were just too good to let sit at 1/1. By this point I think I had my first rainbow 4/70 4* team
- Built my second 4/70 rainbow team, while continuing to work on getting more 4* to 3/60 and finalizing my 3* roster
I had absolutely rotten luck when I first started playing 3.5 months ago, and couldn’t pull any 5* for the life of me. This turned out to be a blessing however, since it meant I didn’t get distracted by the shiny new 5* and had to work on my 4* and 3* bench.
The idea is to slowly build up a good 4* roster so you can start finishing those rare quests for the guaranteed mats ASAP. I think by week 3 I was able to finish the second last stage of the rare quests, and being able to have a guaranteed 3* mat once every week really helped progression. The 3* you level are not wasted since you need them for the rare tier of the monthly challenge events. The completion rewards even for the rare tier are very lucrative and always include a guaranteed 3* mat, which is why I focused on building a 3* roster while waiting to have enough mats to get my 4* to 4/70. Additionally, you will have to build roster depth at some point if you want to finish the class quests for those emblems, and this is something I’m still working on.
A good 4* team will allow you to do everything in the game, including finishing the legendary tier of events. They also only cost half as much mats compared to 5*, and level much faster while requiring less ham.
For reference and with a few exceptions, most 5* at 3/70 have about 93% the stats of a 4* at 4/70, so they’re still a bit weaker, but they’ll have costed you more than 2x the amount of resources to level. Plus you can throw emblems on the 4* to make them even stronger and make them “pseudo 5*” to help you win even more events/quests.
Anyway, I guess the tl;dr answer is, forget about 5* for now, focus on building at least two rainbow teams of maxed 4*, or at the very least, “enough” maxed 4*s that you can start finishing everything in the game. By everything, I mean the last stages of the rare quests and the legendary tier of challenge events. The class quests you’ll need time to level up suitable heroes, but definitely try to finish the final stage if a reset emblem is involved.
And just for your benefit, I have 12 maxed 4*, 1 at 4/52, another 11 at or very close to 3/60, 23 maxed 3*, and I’m still struggling to get even ONE 5* (Telluria) to 4/80 lol. Granted she wasn’t the focus of my efforts, but I think this highlights just how long of a journey it can be to max a 5*.