Is anyone else having hard time with this mission on 'lethal' difficulty?

I have pretty much one shotted all other 'lethal' ops with randoms (with my Bulwark) but this one is something else. I have tried running it 7 times but people keep dying, there are just too many enemies and too much ranged damage all over the place. I think the difficulty of this mission is way harder than any other mission on 'lethal'. Not one group has been able to make it out of the tomb in all  these runs, its just awful.

Is anyone else stuck on this mission or does anyone has any tips?

I play at random times so its really difficult for me to play with the people I know, that's why I mostly play with randoms but this mission seems like its not designed with randoms in mind or may be perhaps  they should get rid of either one of 'fusion core' or 'skull escort' part,  too many enemies spawn during  this part including multiple 'Terminus'  level enemies.

I think the operation is not harder than the others in itself. The biggest problem ( at least from my personal experience) is that many team members wastes too much time on the second part , where the dragon is flying and spits fire on the road . Instead of just running at the right time and skip the enemies , they just stand there trying to kill everything , resulting in a wipe for them and forces the sole survivor in performing a miracle in order to save the day. So maybe its just a matter of better knowledge of how some parts of it works