mass effect 3 dlc weapons not showing up

I know some of you are probably thinking I should have at least lvl 5 Bio Charge and lvl 3 Pull, but in heavy gun battles I was finding Bio Charge left me too vulnerable, so I upgraded Carnage and Pull for ranged attacks. I was wondering if anyone knows how far back the last weapon modding station is before this battle? I haven't added any manual saves though, so I'm worried any previous auto saves would take me back prior to one of the other tough battles. I think it was a Centurion or Phantom that got me the time I nearly beat it. I've been what seemed to be close to the end of this battle, with both Adutants killed, Aria assisting, and some Cerberus goons to mop up, but it's always something. I realize I'm probably making it harder on myself doing this for the first time on Insanity with a fresh start, but I did buy the level VI upgrade for my assault rifle at Harrot's Emporium on Omega. I can basically get in a Biotic Charge then a melee or several assault rifle rounds before using another Charge, but I'm frantically dodging every which way to try and avoid the damn Adutant attacks. Maybe I'm wasting time destroying the shield boosters too. I think I'm going to have to find a better route to take to disable the generators because I keep running into problems where two Adutants come at me. Here's a couple screenshots showing how our skills are allocated: Problem is I am at a save point at the start of this battle and I cannot reshuffle my or Aria's skills. Limiting myself to these two gives me a 131% power recharge boost, but if I'd known that I would rarely have used the Hurricane, I'd have left it behind and gotten a better recharge boost. I also have the N7 Hurricane with damage and light materials mods. I'm using the N7 Valkyrie with damage and clip capacity mods. I'm playing as Vanguard and may have gone too defensive on my skill tree. I'm at what appears to be the final battle with Petrovsky's Adutants and Cerberus goons. I guess having Nyreen protect the civilians vs focus on the enemy may have made things harder, I'm not sure. Everything in the campaign has gone fine so far, and much of Omega too, but I didn't realize what I was getting into with the tougher battles.

This is my first time playing the Omega DLC and I'm on Insanity with a fresh start. I'd already played the Citadel DLC on Hardcore, so I thought I was prepared to handle anything ME on Insanity.

Mass effect 3 dlc weapons not showing up