I’ve heard people say rooting powder then aloe which kind of makes sense. My local shop guy said in his experience in nurseries, if you sterilize the cuts then immediately use a gel it pretty much cuts out any risk of contamination which makes sense to me.
@TopShelfTrees1 has a system that’s all-hormones all the time I saw in another cloning methods thread worth reading here, with powder then gel then into rooters also soaked in Clonex: