Renar

Moving forwards, through the river, Renar draws another shortspear, and, when he judges his range, hurls another spear at the retreating-seeming elf ((Moving to directly north of Cefos, if there's one square of river I'm with 1 movement available, and attacking the elf directly south of me))

Spoiler
Show

Luckily, the elf is within one range increment, so win-win.
(1d20+2)[13]
(1d6+3)[9]
+forcrit
(1d20+2)[22]
(1d6+3)[8]