Yup! use 4 stars rather. The fight end too quick and it disconects same as when facing another player's 2 star you should see to it that the fight doesn't end within a second
Your 4 star deck would help.
Ending a fight too fast would result in a game crush. So 4 star is more suitable than 2 star in BG points farming since 4 star hardly lets the same crush happen.
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just Dex once at fight start with 2 stars and you’ll be fine,..no disconnect.