Taking the HESI for the 4th time and need advice

I am taking the HESI for the 4th time and need some good advice about studying or any study guides folks have found helpful (I have already used the Caplin and Hesi book). The school considered V1 a practice Hesi which I passed and I ended up failing V2 and V3. Does anyone know how many HESI versions there are? The questions don't seem to resemble anthing I have ever seen before...at least nothing my school has taught me. The last exam included many post opt questions however, it is my understanding that Lpn's do not handle post opt patients. Any suggestions or help would be very much appreciated.