How to invest during earning seasons?

I'd say stick to what you know and feel most comfortable with.

For me, I am comfortable with trading with MacD, KDJ, RSI and candlestick reading on 1D interval. With these TAs, I will enter the trade with a reasonable price target to swing trade it (eg ~+2%), then exit afterwards.

Regardless of the results, I see myself remaining firm in my deicison because my rationale for entry did not changed due to the situations.