Multi effects pedal + Multi effects pedal?

Hello there,

Yes, of course you can use more than one multi-fx pedal in your chain. The possible issue becomes dialing in the tone you want where you have the same (or similar) effect on in both pedals. For instance if you have the distortion on with multi-fx pedal 1 and the distortion (or overdrive) on with multi-fx pedal 2, that will be hard to control the tone.

Later,

set that line 6 on sparkling and pass on ebay and purchase a chairman GT3 or GT5 you will discover them for under 200.00 and that's all you will ever choose for till your line 6blows up. then you definately can use your line 6 for a door supply up and purchase an excellent fender tube amp. A twin Reverb could be my suggestion.

No, you will burn both of them out. Only use one wah-wah pedal per guitar.