[quote name='Mr Unoriginal']Finished mission 3 today, still really liking the game and hoping it doesn't get frustrating soon.
A general question: did most of you do a lot of grinding between the missions? Is it necessary to have all the best weapons for each battle?[/quote]
Grinding isn't necessary at all. As you go through the weapon trees, just make a decision as to what type of weapon you want to go with right off the bat (ie- accuracy weapons, firepower, or extra rounds). That way you aren't researching 3 branches when you only ever use one branch. You can then pump the rest of the money into the tank. With experience, pump it all into the units you use the most (I rarely use my shocktroopers, so they are low level, whereas my snipers, lancers, and scouts are much higher). Even with "crappy" weapons or unit levels, you can still make it through the game.