I use 100 grain NAP Spitfires and 100 grain Slick Trick standards out my Titan HLX. If your Extreme does hav either of the Accu Draw cocking mechanisms, you will probably want a cocking rope or you could get Ten Point new Accu Rooe which is the retractable cocking rope. As far a wax I use the Scorpion Venon Wax and really like it so far. You could look at the Bow Jax dampeners and Ten Points new SDS system if you are looking additional accessories to help with any vibration and noise the bow may have. I have them on my HLX and they do make a significant difference. As far as practice arrows I just use some of the extra Pro Elite carbon arrows that I use for hunting.