Delay Guitar Effects

This concerns the NS3. It's got send-return jacks on it, besides the input-output jacks, and I'm trying to decide if they're worth using.

Here's my current chain:

Guitar - TU2 - vol - wah - CS3 - SD1 - Input to NS3 - Output frm NS3 to Input of amp; Effects send from amp - CH1 - DD3 - RV2 - Effects Return to amp.

But, would a better chain be one like:

Gtr - Input to NS3 - Send from NS3 to vol - wah - CS3 - SD1 - Return to NS3 - Output from NS3 to Input of amp; then Effects Send from amp - TU2 - CH1 - DD3 - RV2 - Effects Return to amp.

I'm hopeful some knowledgeable fellow guitarists can follow that and give some advice on setups that work. I know it's an individual thing, just want some ideas on what you guys do or would do.

Thanks in advance,

Chris