is really hard.....

I finished it on normal first, now im going for that achievement. Im thinking this could be the only game i ever get all the achievements for since theyre so straightforward.

I imported ME1 save Lvl 41 Renegade Soldier

Just recruited Mordin, but im struggling through every battle and only just scraping through thanks to the heavy pistol and sniper rifle.

Ammo seems to be so scarce now.. and powers take so long to refresh

If anyones already done this could u offer some pointers?

It is not actually that hard... but only the 2nd half of the game, which I thought was a complete joke, though I was playing as a sentinel

My main advice would be to make good use of your squad's powers particularily overload/warp/incinerate that remove armour, shield and barriers. Also, the Vorcha are by far the most annoying enemies owing to their regenerating health. Stay in cover obviously, and take your time!!!

But things will get easier after Horizon, then it will become actually easy after the collector ship

The reason for this is the upgrades. Focus on your sniper rifle, as that is just an incredible weapon, but upgrade everything you can. Having imported from ME 1 and having already completed the game once, you should have a nice mineral and cash boost, so use these for upgrades as soon as you can!!

And also, here are some more in depth guides: http://www.trueachievements.com/a41619/insanity-achievement.htm?showguides=1

I'm on my second run through as a vanguard.

Tips for this:

1. Use the Carnifex Hand Cannon with level 1 cryo ammo, as this has 100% freeze rate on unarmoured/unshielded enemies.

2. Evolve Charge to Heavy to get the slo-mo effect.

3. Choose sniper training on the Collector Ship, not the Krogan shotgun, use the M-22 Eviscerator instead as it has better mid range.