If your issue is content I would suggest UWorld with at least one assessment test (The assessment test that I took on Uworld felt and looked exactly like my NCLEX except the NCLEX questions were more vague). The rationales for both the correct answer and the incorrect answers are very thorough. It's all I used to study. I'd also suggest getting a content refresher overview/book with the basics such lab values, s/s of common disease processes etc (sorry I can't recommend one because I didn't use one). Also please please take notes on every question (right and wrong) when you remediate. Don't just read the rationale and expect it to stick.