Kind of Late to the Party

So thanks to everyone who took the trouble to reply to my post. For the record I used Garrus and Miranda throughout and despite having to do multiple plays on some missions I (finally) got the job done. I should add that I (of course) followed the standard
advice during the suicide mission (fire team, rescue escort etc.) But hey! I got the achievement for insanity AND (because I hadn't got it the first time around) Nobodies left behind. Boy do I feel good about it!

Cheers to all and thanks again!

If you are soldier class (like me), it's good to have Jack around as well. Her abilities are great for crowd control. IE, on MIranda's loyalty mission, bringing along someone like Garrus won't be useful. Miranda and Jack make a pretty lethal combo.

I was also a Solider. I used the Mattock from the fp pack and some armor that kept my shields strong. I also used a bonus talent that was either barrier or shields, just so I could turn it on and book it in bad situations.

I advise Miranda as a squad mate. As annoying as she is her passive perks rock. I also took Mordin a lot of balance it out. His incarceration ability was great for taking down collectors. May have also used Garrus too, cause his ugly face made me feel sad.

Get the Firepower pack DLC. All the weapons are extremely powerful and will help you mop the enemies up quite quickly.

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Also to get through Insanity it is a good idea to consider who to bring with you. It really can make or break certain sections.

Customize your squad depending on what you will fighting. Miranda is the Swiss Army Knife of squadmates; her team bonuses help everyone and she can deal with Shields (Overload), Barriers (Warp) and Armor (Warp). If you're fighting anything with Barriers
or Armor, I recommend a post-Loyalty mission Samara, as her Reave can handle both and effectively wipe out protectionless targets. If it's just Armor and no Barriers, Mordin's Incinerate is deadly. He's a great help against the Blood Pack. Against shields,
such as Geth or Blue Suns, I recommend Tali for Energy Drain or Garrus and Kasumi for Overload. Also, you will want to swap out your bonus powers in the same fashion. As a soldier, you don't have a lot in the way of versatility, but you can make up for that
with choosing your bonus powers. Especially things like Disruptor Ammo and Warp Ammo which can benefit the entire squad, or Reave which can help restore your life in a pinch.