Well, currently you are shooting 5.8 grains per pound (gpp). Some would say that is too light, but not me. That is just right, IMO. One easy thing you can do to add weight is shoot a heavier tip, but that may make your FOC off kilter. A Beman ICS hunter camo 400 would put you at 405 grains.A Beman ICS hunter black 340 would be about 417. With a 27.5 inch arrow, I am afraid a 340 will be too much spine. A camo carbon arrow will add weight, and most likely put you in the 400 gr range. A Beman black max 400 will work. At 9.6 gpi that should put you over 400.

Now, let's say you are shooting that 384 grain arrow 275 fps. Comes to 64 pounds of KE. Let's also say you are shooting a 400 grain arrow 270 fps, also comes up to 64 pounds of KE.

Which leads me to my original statement, you are not too light now.