I want to assemble a double crankset chainring 48/32 for a Touring MTB.

Is it possible to change the chainring of a crankset SLX 36/22 into 48/32 and to use it without bashguard?
Or: Is better to try it with a Crankset XT 48/36/26, removing the small one and changing the middle for 32?... Would need bashguard or chainguide?

In any of the cases: Can use a X.9 front derailleur with a double chainring 48/32?

Thanks in advance.