any input on 11 series

hey all I am looking for a set of 11-68 weight to try out right now I have my 05 900 fusion 121x2 and I am running 11-66 weights and pulling 7850-7950 so I think I need to be heavier I also have had mtx 68 with 2 gram in first hole and pulled the same rpm I was gonna put in 10-74 but not sure if it will be to heavy any input would be great

11-68 weights function the about the same as 10-70. here is a team tip you can read telling the diff. in the weights