Is this my cue to build Carnage?

I already have him 6 stars and have the MT2 from the Valentine's Day event, with enough gems to buy the uniform, so might be a really dumb question lmao. But my account is new (literally a month old), and I wanted to focus on cards/swords/PvE before building a PvP character, so?

I already have him 6 stars and have the MT2 from the Valentine's Day event, with enough gems to buy the uniform, so might be a really dumb question lmao. But my account is new (literally a month old), and I wanted to focus on cards/swords/PvE before building a PvP character, so?