So I've been running around with level 5 incendiary ammo turned on and it's giving me that warm feeling where I want to roast marshmallows over a smoking Reaper corpse and sing Row, Row, Row Your Boat with Spock.

![Marsh melon anyone?][1]

Except when I actually want to use a different mod for a particular reason, is there any reason not to leave something like this turned on all the time?  Will it eventually trigger some meter that will leave me vulnerable?  Somehow deteriorate my weapons?  Cost me credits? Kill my fish?  Anything?

As a soldier I have access to Incendiary, Cryo and Disruptive Ammo options.  

Do particular assault rifles work best with the ammo powers?  Eg: Is rate of fire one of the best methods of determining it's effectiveness?

How can I use them to greatest effect in combat?  

What are the strengths and drawbacks of each ammo type?


  [1]: https://i.sstatic.net/1Ggwt.jpg