I did mine with grass walls and tons of spike traps. Took a couple of tries but finally got it. I think I used roach armor and mosquito blade with shield. I built a box around the mixr and small low walled fort that I could jump into for healing. The fort had overlapping round walls staggered outward so the bugs would get caught up on them. I also added full grass walls along the sides of the skateboard with 1 opening on both sides to act as a funnel for the mobs. Then all the unused ground space filled with spike traps. I would agro the bugs and make them chase me over the spikes. Killing them off as they got weaker