A good flank and aerial enemies can give Pip a hard time that he will not use potions for allies instead for himself. Try use cauterize as well. Resilience also a good counter for his slow and chicken durations.
Impasse can deny Makoa a shot and/or kill on his anchor target if done fast enough. Hold down the skill button and release after Makoa throws the anchor, putting the wall between him & the target (this can also save you as well).