Hell Mode: Volume 9 by Hamuo

Allen begins developing his own island and army, aiming to do so as efficiently as possible. From having elves create a habitable environment to testing out the easiest possible route through the class promotion dungeon, Allen has a lot on his plate. He’ll need the help of his friends to get it all done, and they’re eager to lend a hand!

The No-life Gamers get to work farming monsters, finding new gear, forming friendly international relations, and helping fund the Allen Army.

Developments go smoothly until Allen is summoned to a Five Continent Alliance conference for questioning. Word of the crafty Summoner is spreading, and world leaders are curious about what he’s up to. Can Allen successfully negotiate, or will the Alliance become another powerful foe for him to stand against?