While she´s probably not best adept(I would say HA and DA are both above her), she´s still very solid one. Strong and reliable, capable of good damage output. You don´t necessarily have to go for bubble and reave(or vice versa) for explosions as I agree it´s often quite risky. It´s s fun way, but the thing is if you feel it´s too dangerous or if you need to keep distance, you will be perfectly fine just using reave and shooting with anything as long as you have warp ammo. Then when there is good opportunity, you can switch to reave and bubble. I like to play with bubble and try to make explosions, but to be honest my main source of damage is reave and weapon.
I know many people think bubble is not very usefull, but I really like how versatile it is. It has great stagger effect. Perfect for revives. You can cast bubble around you and team corpse and everything inside gets staggered. By the time enemy recover, you are finished with revive and can follow with reave for explosions. You can place it on choke points or around drone during escort or to protect hacking circle.
Pull on husks, abominations, troopers and other small...creepers 