What do you mean with ‘trying’?
Properway is to put it in de Davinci /LUT /ARRI folder, go to the config page in Resolve, click update LUTS and set it there for the whole project or go to the color tab and add it to a node.
THe REC709 version of ARRI is indeed very saturated but do you use the latest ones I have on my site? (Previous ones where not really good)
https://redtalk.nl/en/download/cat_view/19-resolve
Make sure you match the LUT to the camera ISO setting. The LUT you describe should be used for a 160ISO/ASA recording.
Bastiaan
Resolve system:
MacPro 8 core 2010 – 16B memory
9TB harddisk (1 system disk, 8TB in software raid 0 for data)
Nvidea GTX285
Nvidea GT120
Blackmagic SDI Decklink
RedRocketcard.
Tangent Wave panel
Transvideo 15″ Cinemontor Evolution
Also running it on a MacBook Pro 17″ (5.2)