If you have been playing a about a month like I have, rack up the shield skills, missiles/rockets to heavy, get electronics and engineering to level 5 to increase your cpu and power caps
Possibly get the learning skills to 4 and then focus on items such as electronic warfare, MWD's etc etc
Oh as for hybrid ammo, if this is for a rail/coil gun then look for antimatter charges, either small medium or large depoending on the type of railgun it is. Seems the antimatter give off slightly more damage when they hit
Also try and get to the large/capital versions of the weapons you use as soon as you can, the amount of times I have seen my little merlin take out a caracal cruiser due to the player using small missiles on em xD