I'll start, but I'm learning too so...yeah.

As a rookie bomber, I did something very similar. NPC fights you will cru* with control, chakra drain, and heals. Then mix in the bothers and you will hurt things quick and hard. Once you get to PVP, things will go WAY different. I learned real quick that NPC fights gave me zero experience fighting another real ninja. Your bomber and healer will be the first to go. Against blitz teams your bomber might even go in the first round :(

Give us the rest of your ninjas and summons. Keep grinding. Laugh at your loses and know that your team will grow stronger and stronger. Make friends with OG nins and ask for guidance in-game. I was pleasantly surprised with how friendly everyone is...even our plunderer O.O

Congrats on the brothers!

Thanks