After our discussion earlier I've read up a bit on armor skills and I think I've got a better idea of how best to configure things now. That said, I think it's likely there's lots of information I'm still missing. Anyone got a link to an especially good guide to how these things work, or a list of especially good example armor sets for low rank?
There is not much info about skills in low rank because the seleciton is pretty limited. You could always check an armor, see if the skills/resistance would help you in any way and get said armor. Try to gem out any negative skills too.
In high rank you will have much better options, including the mixed Gore set (head, arms and legs from high rank, chest and pants from low rank) which helps a ton with sharpness +1 (further increases the sharpness bar of your weapon, the weapon may even go up one color) but it comes with both negative resistance to fire and a negative skill that further decreases the defense to fire. You will have to use a fire resistence talisman (not enough slots to gem out the skill) and eat fire def food to fight certain monsters like gravios.
Edit: These are the armors I used until near the end of High Rank
Low Rank
Ranged:
Tetsu (Def+)
Daren Mohran (Pierce+)
Melee
Velociprey (physic, always see the monsters on the minimap, no need for paintballs)
Rathalos (Increased Fire attack)
Brachydios (slime+bombs)
Gore (Biology and Spirit skills)
High Rank
Ranged
Jaggy (Attack+, Reload Speed+)
Soul Rath (Earplugs)
Melee
Velociprey (physic)
Qurupeco (Mostly support with Wide range, Horn Maestr, Capture Guru)
Mixed Gore (Sharpness +1)
Brachydios (Slime)
Rath Heart (Windproof)
Lagiacrus (Awaken, Weakness Exploit)
Note that there arent all the skills these armore have to offer, just the most important ones that I wanted.