I need to disable the bandana skull am I right?
A little confuese due to the ALL Skulls ON
Thanks 
Assuming it’s the same as the MCC, if the skull has a 0x multiplier then turn it off.
So is it confirmed, and how do you know which skulls wont count against the laso achievement?
Achievement says “complete the campaign with all skulls active” so you need to turn it on.
No you need all skulls activated. I have already completed LASO and I 100% had the Bandana skull on.
Anybody have a strategy on how to beat tremonious boss on foundation on laso? Seems to be invincible
Rush the jackals and throw spike nades at him until he dies. The bosses continuesly try to evade the explosion and the spikes coming off of it afterwards so they get stun locked for almost the entirety. Just watch out for when he all of the sudden throws a nade between the stuns or flies across the room from the explosion. You can get up close to him since hes stunned as well but a little distance never hurt nobody
Do we need to have the skull that removes the hud on too?
Hi. I just beat the game on LASO. Actually took me less time than regular Legendry thanks to the scorpion gun.
The answer to your question is yes. You absolutely need to have the bandanna skull and all the other skulls on too to get the achievement.
Spam him with the shock grenade to stun him and follow it up with sticky nades and rockets. Might take a few tries but that is the best method. I left the jackals alive incase i needed to melee something for shields. About 6-10 rockets is what it should take to kill him. You could get lucky and send him flying to a wall and get a one hit kill too, but that is more luck based.
Yes.
I Just realized that the iron skull isnt even in this game so SLASO isnt really going to be that challenging, yet another let down for infinite.