I have a 3.4 gpa, I took the MAT and got 397, I have been a RN for 9 years and a LVN for 4 years. I have my CCRN and I took the graduate statistic class online at SELU. In addition, I work in a large CVICU. I have at least 6 years of ICU experience in MICU, NeuroICU, SICU and now CVICU.
I would say try to get into a teaching facility ICU, if possible. That is where I gained my greatest knowledge base. Try to go a step beyond just being proficient with task but understanding the whys behind the certain drugs given and the disease process.
Good luck in your endeavors!!