The pretty consistent strategy is to use low-ranked options for the first 8-9 rounds, then use your best for as long as you can.
If you're lacking in top-ranked champs then there are a couple of strategies, either use the best you have and hope they're good enough to brute strength through or else try sand-bagging, use your 2 best and then 1 worst so that you can stack the odds in your favour to win 2/3 of the fights.
Once you get to round 20/21 you're in infinite streak territory.
For the four star basic, I use pretty much use anything from 1-9, then start sandbagging 2 r3 4 stars with lowest PI champ I have available. I make sure to use my best champs from about 12-16 (max or r4), then I believe if you keep your PI above 3k, you should be good to go.
As for the 3 star, I am not sure the best way to get an infinite streak as I have 20 something max 3 stars. So someone else might be able to give you a sandbagging method for that as well.
Need an infinite streak guide for 4* basic , 3* featured . Always seem to lose somewhere in the middle .
Looks like your acct is a high level one, should be no issue if you have enough 3* and 4* (respectively) that are either Max or within 1 Rank from Max (like 3* 3/30+ and respective 4* 4/40+). Just can always use only those champs without problem throughout building to streak and during streak afterward too.
If you never build up enough of your lower champ rosters at high enough Ranks, then might be running into problems with some “ALL 4* 3/30” teams, so can mix some 4/40 with your 3/30 for each match in 4* Basic arena. (similar with 3* arena too if not enough within a rank of Max).
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If you're lacking in top-ranked champs then there are a couple of strategies, either use the best you have and hope they're good enough to brute strength through or else try sand-bagging, use your 2 best and then 1 worst so that you can stack the odds in your favour to win 2/3 of the fights.
Once you get to round 20/21 you're in infinite streak territory.
As for the 3 star, I am not sure the best way to get an infinite streak as I have 20 something max 3 stars. So someone else might be able to give you a sandbagging method for that as well.
Just can always use only those champs without problem throughout building to streak and during streak afterward too.
If you never build up enough of your lower champ rosters at high enough Ranks, then might be running into problems with some “ALL 4* 3/30” teams, so can mix some 4/40 with your 3/30 for each match in 4* Basic arena.
(similar with 3* arena too if not enough within a rank of Max).