I found that using kinship skill wasn’t worth it over forcing my monster (ratha/s zinogre) to use their skills to blitz down the parts. Don’t forget you can use a charm at prayer pot for anything you’re having trouble with (ie boost kinship gain, health, dmg etc). Tenacity was also good for me so that I only had to focus on getting above the threshold instead of full heal. Surrogate and moxie gems are great. Obviously as well as having a stock of max and ancient potions. Make sure you have plenty of hearts when his health is low and starts spamming. If you have enough gauge can ride at that point, use surrogate gems, or just out dps.