cool I'll have to try that. So is there any other tips you can give me? i'm playing on veteran
You might want to hop down to Beginner until you get used to the game's flow and mechanics. Don't worry, despite being the easiest level, it's not easy at all. That's X-COM, baby.
As for smoke, I supposed I've never used it extensively, mainly because its effects have remained largely unclear to me. It's always felt like a difficult, double-edged tool. Yes, it blocks line of sight and all that, but that works both ways. If you pop smoke at the base of the ramp, and within the Skyranger as well if things are hot... sure, the aliens can't see you, but how can you see past the smoke yourself to get the drop on them? Can units in a cloud of smoke see outside more easily than those who would try and see into/past one?
That's why I'm generally uncomfortable using smoke grenades, because I feel they'd hamper me as much as they would the aliens.
stay in groups of 3+
Actually, careful with that. Aliens use their fantastically destructive grenades far more often in OpenXcom than they did in the original game, and won't hesitate to hurl them if they spot teams of 2+ troopers. It's become quite tricky since grouping
is necessary to keep soldiers covering each other and advancing safely.
The only advice I can provide, taking that into consideration, is to avoid staying in too tight groups in built-up areas like the urban environments in terror missions: the amount of clutter represents a problem to line of sight, and being around multiple corridors/alleys increases the chances of aliens popping around corners to lob their explosives.