I've been criticised for mixing pantheons, is this a valid criticism?

No, it’s a narrow minded bigoted criticism (in my opinion anyway). Who are you giving the right to say what you should believe and/or practise on your path? If an Egyptian God calls to you for something and a Celtic God for something else, why should you have to reject one of them in favour of being consistent across pantheons? Admittedly some purists will tell you that pulling from different sources is not advised but I think they are talking rubbish. If something genuinely works for you and you know wholeheartedly that this is the right way for you to practise, you’d be daft to turn your back on it.

As a side note, you’d do well to call yourself eclectic if you do choose to use bits from different traditional practises. Pulling from different cultures means you are not a practitioner of any one tradition but that you use a blend of what works for you. To give you an example, I use circles in my magical practises but just because I share one Wiccan practise does not give me the right to call myself a Wiccan. However as an eclectic witch I am perfectly free to borrow the bits that work for me without needing to identify wholly with their belief system.

The only time you do open yourself to valid criticism is when you claim to follow a path or a tradition but fail to demonstrate the required beliefs. Identifying as eclectic sidesteps this issue.

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