Right after the multi-armed ape climbs up to Tor-ber, Fronaldo rapidly scales up to the tier #2 and attacks the creature from behind.
Spoiler: crunch
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Accelerated climb to tier #2 to flank the bumble. With haste this should be half speed or 30 ft. Use acrobatics to avoid AOO if necessary.
Attack with magic dagger, use risky maneuver, spend a Glory point for +2 to hit.
to hit - (1d20+13)[28]
to dam - (1d3+12)[13]
sneak - (3d8)[15]
If sneak is successful, 3 bleed.