Any alternative for my phone even thought no famous Custom ROM is supported by it!!!?

I have a Lenovo Vibe p1 and I found out that there is no Custom ROM available for my phone.
Its not that my phone is worthless.....My phone is Marshmallow with 1.5 GHZ processor......
Is there anything I can do?
Even cyanogen mod doesn't support my phone!
Please help.
Thanks in advance!

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