Should i start growing this team?

If you are get a good core ( Android 13 and stuff), Yes.

I got Android 13 today so i should grow it ?

And which fighters i should use from all 6 of them

Replace Android 18 with Android 17 -Purple- and you are good.

It is lowering my ability bonus to 1400+

It’s because Android 17 don’t buff androids, but it doesn’t mean your team is bad. He’s really good in the bench if you don’t have super 17.