Absolutely do it. There's a chance they may not work but let your nose be the judge of that. Unless you're using a grapefruit aquatic to cover up a stinky oud I very much doubt you'll be making anything that literally "smells bad" as long as you have good starting scents. I'll trust your nose. I very much doubt that the sweet spice of Bleu would create a catastrophe if layered over the florals and powder of Sauvage.
And consider than 99% of people don't care about what what scent you wear other than "it smells nice." You may not be a professional perfumer but I realistically don't see a Sex Panther incident coming out of this, unless you're wearing 8 sprays of both at work, in which case you have other problems.