okay, after few days of experimenting how to install the cm 13 nightly bacon, its coming to light. im using sultanxda method to install it.
1. clean everything on recovery
2. flash latest cm 12.1 nighly
3. wipe system
4. flash latest cm 13.0 nightly
5. flash gapps
im using slim gapps, dont know if other than that could work.
then there it is, cm 13 is now on youre hand, but sadly cameranext mod is unusable, but dont worry, i use colour os camera which is fantastic.
Note : im using Oneplus one by the way, other than that might be totally different, please refer to xda and youre phone forums discussions. Lastly, big appreciation and thx goes to sultan xda, not me.