Kosmo

/dev speaking here. Trip mine is your friend! When you see that purple boss lurking at the end of your mission laughing at you, dont quit, PREPARE!

Go to the nearest corner and plant several trip mines, when 3-5 mines are down, throw some caltrops and snipe the boss. When he turns the corner he is in for a BIG surprise : ).

It help dramatically if you slot Trip mine with 2 accuracy SO's since you will normally be using it against higher level enemies and TD doesnt affect it.

If no corner is available, caltrops and an Auto Turret work Nicely when available.

Always analyze the area in which you are attacking prior to the actual attack. You never know when a sapper, or even another group might be right behind the wall.

Learn your enemy, if they have a acc debuff, have a insight prepared, if they have a mez, take them out first.

Always check who you are fighting. Nothing is worse then fighting a group of +1 minions only to find out that you didnt realize there was a boss in the group.

A prepared blaster is a safe blaster.