I'll give it to you, since no one else has answered. But there are @ least 2 paths w/ fewer points. Maybe I could have hinted - go the Kaurava route instead of the Pandavas.
Kritavarma - Charumati - 2 pts (bahu)
Charumati - Samba - 2 pts (half-sibling)
Samba - Lakshmanaa - 1 pt (spouse)
Lakshmanaa - Duhshala - 2 pts (bua)
Duhshala - Jayadrath - 1 pt (spouse)
Total - 8 pts
Another route:
Kritavarma - Charumati - 2 pts (bahu)
Charumati - Samba - 2 pts (half-sibling)
Samba - Duryodhan - 2 pts (damaat/sasur)
Duryodhan - Jayadrath - 2 pts (shala/jija)
Yet another route - Kritavarma to Krishna, & Krishna to Duryodhan - both samdhis - and then Duryodhan to Jayadrath - will still give you 8 pts.
Anyway, next question is yours, Varaali!