I finished the game and haven't spent a dime. I think the key is to take your time. Too many people don't want to wait and the programmers cash in on that. I don't blame them. They have to make a living too and Since when is profit a dirty word? They made a product that you want. You know what it is/was and you bought it.…
Once my burea armour and damage reduction was upgraded I didn't need any medkits. Well, maybe one. I noticed, once I upgraded, and I no longer had to hit that midkit tab 20 times a mission, (and didn't have to worry about it at all) my attention was freed up for quite a few other things. What level is your armor?