Is there Mass Effect 2 "ultimate playthrough" in regards to Mass Effect 3 import?

Solution 1:

Best available ME3 setup? You'll need to go all the way back to ME1. You can't have the ultimate Mass Effect play through without playing ME1.

1. Beat ME 1 on Normal (This unlocks Hardcore and ups the level cap)
2. Beat ME 1 on Hardcore (This unlocks Insanity)
3. Beat ME 1 on Insanity with all DLC getting to max level completing every mission and quest.

Save Wrex too. You'll lose Mordin in ME3, but War Asset wise it's a better deal.

This gives the best setup for ME2.

4. Beat ME2 on any difficulty (This increases the level cap)
5. Beat ME2 on any difficulty again with all DLC getting to max level completing every mission and quest. Keep all squad members and crew members alive.

That should give you the best possible setup.

Here's a short list of ME1 and ME2 decisions that can effect war assets in ME3.

Hope that helps!