With a shorter draw and moving to 65# you should be looking at some heavier arrows like the Easton FMJ. Don't play with light arrows and try and make them work by adding more weight in different places (just adds to tuning issues). Just check the arrow charts and find what will work for your setup. Adding the 125 grn BH's will help also.
Actually this is backwards. Arrows are rated for spine at full length. If you cut them shorter, the spine will be stiffer than the rating. So, need to know how long you cut your arrows. I have 31.5" inch draw and cut my arrows to 29.5" (i.e., BHs inside shelf, rather than in front of riser.
Oonce you determine how long your arrows are cut, look at specific manufacturers spine recommendations (i.e., they have tables based on arrow length, BH weight, type of cams or round wheel bow, and poundage.
But, I'd guess you should be shooting a 340 spine arrow.
ET