After getting bored of all the FSC and Shadow lair runs. I thought "why not suggest something new?"
Then i got an idea.
The golden lair was the idea.
These lairs result in getting into the core.The story is :-
The core has been opened by lieutenant vaelyn but to get to the core you have to cross the Golden lairs ... These lairs have the same system as shadow lairs(The key etc). but the base would be that there will be half golden monsters and half normal monster. As per wiki golden monsters cannot be hurt. this would add to the difficulty. and to add more difficulty the monsters of the golden lairs would be dealing all the status conditions and would be of different types ( undead,constructs etc.) Not only that. to make this stuff easy the game would see its second expansion pack. this expansion pack would reward a sword that could convert the golden monsters into normal monsters. and this blade would deal very less damage (normal damage)( to make it difficult ).
After a party has completed all the levels ( i think 6 would be enough ) then they would reach the core and meet the alpha squad there.And after that They would have to complete 6 more levels (similar difficulty to the previous 6 ones) but in these ones alpha squad would aslo help. And after these the party would reach Haven they have to give very much materials for restoring the Skylark and if they were able to pay all these materials then they Would go to thier home planet that i would like to call "Chromius" And after that they can do expeditions on different planets, ( going after monster etc) exploring new planets.
Shadow Lairs alrady have it's version of 'golden' immortal monsters. Its called infinite respawn.
Works in a pretty similar way, you kill a monster, a new one appears and takes it's place.
But then, that new expansion with the golden sword is basically a win ticket, and thats even worse.