Winning one match is required for one of his achievements unfortunately. More specifically. You have to pick up the daily and complete the quest by winning and ESO's novice AI is way too difficult
I was thinking about picking up Zerith for my non-ESO+ account. I'd forgotten about the 1 match needed for total achievement. So: when ESO+ is free once a year, can you play ToT during that time?
I would be fine with leveling his rapport by only using the Elsweyr Defense Force quests, if I can finish off the achievement during the Free ESO+ week(end?).
(Worth it for Heavy Sack Keen Eye, for me!)