I am by no means a fantastic crucible player, he'll I don't even know my own stats, check them if you like.
But me and two other average friends made the lighthouse yesterday (on my warlock).
For the love of god stop moaning about it, it's all about luck of who you get drawn against and who's on fire that day, I had a few good rounds and when I didn't my friends did, we used the boons and persevered until we got there.
Yes it's hard! But so was Crota hard and atheon hard the first time we took them on when we were a lower level.
If it was easy to get to what would be the point, we would all be moaning about not getting our monies worth.