Getting up to 300 (or over) and also getting Touch of Malice will help you immensely in the Daughters and Oryx fights. Yeah there is a catch-22 there as you need to beat the raid to get Touch of Malice. But doing the Raid a few weeks up through Golgoroth should get you enough weapons/gear to hit 300+. So you may just want to go into it thinking that is all you need to do for the week (maybe on multiple characters) and then then try again next week. You could also look for an Oryx checkpoint as that fight, in some ways, can be easier than the daughters. And from there you can get the good drops (mainly primaries).
I'd be willing to help but I don't want to spend hours on it as I've already done it 3x for the week - and I've spent far too much time playing the game this week and we have a ridiculous week coming up next week with both Iron Banner and Trials (WTF Bungie?). But maybe I can get a few guys who are good at the relic running and we can get you through quickly. With enough DPS (that comes from light level and a weapon like Touch of Malice) you can get through the daughters in two turns which cuts down a great deal on any potential mistakes running the relic. You can choose who starts (by having people who don't want to be "it" jump off). Then you just get 1 random selection - or perhaps 2 if you can't quite DPS enough.
I did the Sleeper Stimulant stuff from the start on my Warlock. I had much better luck with the Warsats this time and got all 3 done in about 30 minutes. Late last night they just weren't spawning. I just did the missions solo and luckily the matchmaking worked for the strike at the end. Though for whatever reason the 3rd guy quit right after the start. WTF is that all about? That is a specific strike that you choose to run - it's not like it is a random playlist. Me and the other guy were 304+ and I was a self-res Warlock so that was a good group to be with. So we ended up 2-manning it and making it through by the hair of our teeth at the shank boss. But that made it all the more satisfying to beat. Then I ran it again on my Titan (with 2 others this time who both stayed) and got another one just to clear out the mission.
I then ran some heroic strikes and tried using it. It does some good damage though I don't know how often I'll use it over other exotics. It wrecked Valus Ta'aurc's face though

. I also didn't have mine leveled up at all so that was just base perks...
Had some horrible luck with 3 of coins engrams decoding into 290's for like 4 engrams in a row before finally getting a 310 Hereafter. Now if I can ever get that Raid sniper I can infuse it up to 310 hopefully. I do have a pretty nice 1000-yard stare that has super-high stability that I considered bumping to 308. I also though about bumping that Hunter sniper as it looks pretty good but I haven't used it much. But I think I'll wait to see what happens with the Raid next week first.
I still have to run the solar sword strike if anyone still has that to do.