It's not very useful, but you can tame it very early in game. Punch it twice for an aggressive tame or give it mejoberries passively. If you don't want to risk anything, bring a lvl 3 or above Moschops for protection. Have a good one!
Can you attach a leech on it and wait for all of the overseers help to go down because of the leech? If you can, will it still count as a win? I never did a boss before btw. Looking forward too though! Also where IS tek cave? Please tell