So, as my first run, this was not perfect and I may come up with some improvements one day. This build was surprisingly workable nonetheless.
Mage Hat + Red Jacket + Shadow Blaster was amazing, not only does it boosts lance's MP by a whopping 80%, it also gives him great magic attack, immunity to death, and slight resistance to dark. My only problem with it would be his low survivability to physical attacks.
It was important to get everyone death immunity, rune blade on matt also allowed him to regain MP when needed and syphon some foes. Targets worth syphoning include evil worms, rune claws, dark clays, and cosmic monoliths, though all of them except the dark clay has syphon resistance.
About Akron's forms, I chose to start with fire mode Akron to start with a highly damaging blizzard cleaver, which honestly might not be the best opening. Fortunately Akron also never managed to change into thunder form (of which lance has no way of hitting his weakness).
Got unlucky at some parts, made a few mistakes and almost forgot to clear doom at one point too lol, but I managed to pull it off itemless deathless and it was enough to kill him before MP runs out.
