Which class is best suited for a ME3 Insanity playthrough? [closed]

I think that there will be a lot a personal preference involved in any answer you get. Play style will have a big impact on what works best for you.

I haven't played all of the classes in ME3 yet, but I would suggest Infiltrator. They have really good damage output, and tactical cloak is very useful.

You can engage enemies from far range, which favors you. Cloak can get you out of tough spots and away from dangerous melee based enemies. The Incinerate ability is not quite as useful in ME3 as in ME2, but is still a good all-around tech power.

You will need to use party members that give access to Warp and Overload to make sure you can handle all enemies effectively.

Played all classes in insanity, the easiest for me was the vanguard by reducing cooldown at max with armor cooldown + 200% + reducing powers cooldown... Also you can earn how to use nova to never get hit. When you see a banshee shooting you, you have just to do a nova to block all damage because nova give you immortal during animation.

After this, the enginer is very powerfull, I killed 10 banshee in last map on earth before I go on lauching rockets. Helped by Tali and James. This is because I wanted to test if they has infinite respawn. I used Tali for his sabotage and full armored drone. Same for me sabotage and full armored drone. James become get a full armor build, play at melee in first line with drones supports while Tali and me are spamming sabotage, drain, incinerate, ..

The other best classe is adept because you can do easy 3 combo in one row. By example is to use sabotage(1.5s) or overload + incinerate or carnage + warp + throw. In this case you do a tech burst + a fire explosion + a full biotic explosion (+100%) all in one row. If you learn how to sync your shoots and the pattern you can insta kill a banshee.

other classes are more classics.