Throw: Single 13, Double 4
(S13-D4 | 13 – 8)
Option: Single 5, Double 8
(S5-D8 | 5 – 16)
Note: Throwing Single 5 has the risk of busting on a miss into Single 20.
Bonus: 13 & 4 are next to each other, so it’s only a slight adjustment for the second dart.