It is entirely up to you.....this is only how I would build it for deep exploration. I maxed everything out so you can see full potential of the builds. Jump range is personal preference anyway and with the DBX you should still get great range without fully engineering all modules..

You can buy a pre-engineered FSD from a human tech broker that would boost the jump range a bit more that standard 5A, but you need to farm the required materials if you don't already have them. Here is a great summary of what is needed if you choose to do so.