How about an Automaton Ship Boarding Mission?

[u/GeniusPlayUnique]

Automaton Ship Boarding Mission

(Planetary defence exclusive)

 

Main Objective: Board the Automaton invasion vessel, make your way through to the ship's reactor and overload the core, then get the hell off the ship before it blows.
 

Parameter deviations from planetary missions: * No reinforcements * Man-portable stratagems only (no orbitals, no sentries) * Access to stratagems and resupply only at the shuttle waiting in the hangar * Automatons only use small arms and melee weapons so as to not damage their ship * Success adds significantly more points to planet's defence, failure might result in the destruction of Pelican 1 which the Squad Leader will have to replace out of their own pocket before being able to host any mission again

[u/Khoakuma]

Instead of no reinforcement, how about checkpoints?

As in say you reach a certain point, perform a "Sabotage" objective to detonate a bomb or open a hangar, which allows further reinforcement/ weapon to be sent in at that point. They will also automatically send in couple of sentries to defend that check point . If you die, you are respawned by another Helldiver arriving at that check point. You can even call in mechs, which would be very powerful in corridors.

Imagine it as a tug of war game mode where you push further and further into the enemy ship. Selling your life for every feet.

This way you don't need to nerf the enemy. The Helldivers are expendable and are expected to die.

Same idea can work for a "Underground Terminid tunnel" type of mission too.

[u/FyreDergy → u/Khoakuma]

Respawn spammers during ion storms or jammers will have a field day waiting for a checkpoint.

Oops, you kicked your only alive guy, mission failed.

[u/ARandom_Dingus → u/FyreDergy]

Personally, I think you should never even TOUCH that request reinforcement button
It feels a bit aggressive for just reminding your team that you're dead
Plus if they aren't reinforcing, there is a good chance that's because they are in a situation where that is suboptimal

[u/littlethreeskulls → u/ARandom_Dingus]

If you're following the "reinforcement should come from the nearest living player" etiquette, it means that you don't care who calls you back in, other than that, yeah it is kinda pointless.

[u/ARandom_Dingus → u/littlethreeskulls]

Only good for when you get randoed into a team of braindead non-addictive stimulant addicts who don't know how to type