I got the Soros rifle after finishing the Nexus Roc strike, my friends hate me for that. lol
Anyways for the bit with four wizards the best thing to do is just run back all the way to the top of the staircase and snipe from there as they will only attack from the stairs but never come out to chase you. We never died in that part and we had two guys sniping using the icebreaker from there while one guy just went in to finish em with style by using the fist of havoc. For the boss fight just snipe using the icebreaker from the room and hit all 7-8 shots, by this time the shrieker would have spawned so just run back to the previous room and wait for your icebreaker ammo to regenerate, by the time it regenerates fully the shrieker would be gone. Repeat until end.
You can just play like this and even finish this week's Nightfall solo, it'll just take an awful lot of time mostly because of the arc shields. The only bit where you will have trouble is the part with Thralls but if you have a hand canon with firefly perk then that's sorted too.
Anyways for the bit with four wizards the best thing to do is just run back all the way to the top of the staircase and snipe from there as they will only attack from the stairs but never come out to chase you. We never died in that part and we had two guys sniping using the icebreaker from there while one guy just went in to finish em with style by using the fist of havoc. For the boss fight just snipe using the icebreaker from the room and hit all 7-8 shots, by this time the shrieker would have spawned so just run back to the previous room and wait for your icebreaker ammo to regenerate, by the time it regenerates fully the shrieker would be gone. Repeat until end.
You can just play like this and even finish this week's Nightfall solo, it'll just take an awful lot of time mostly because of the arc shields. The only bit where you will have trouble is the part with Thralls but if you have a hand canon with firefly perk then that's sorted too.