Jarri's condition of being afflicted with Tomb Rot is the most important situation for him. If this is something likely to be addressed in-game, he will go back (if possible) to Barrodin, and once physically able, try to impress the dwarves with many barrels of strong drink. With a Charisma of 10 and a Constitution of 15 (making him Super-Stalwart due to his being a Stonebeard, he will try to show his mettle in drinking contests.
If the Tomb Rot is something which is better caroused for, he will try to find whererever a high enough level healer can cure him. He will go there and use his Charisma to petition for restoration. If there is any further opportunity, he will attempt to make allies, perhaps by means of donation to whichever church heals him.