The Best tip for weapons:
1.Ripper
2.Burst Torch
3.Plasma Shot
4.Bubble Blaster
5.Holy Grail
6.Flame Thrower
7.Ion Cannon
The Best Ability:
Cloak or
Transport
The Best Equipment:
Defensive:Armor Plating
Utility:Pickup Booster
Offensive:Stabilizer
The Best Killing Trick for various conditions:
When Outnumbered: Try killing one by one and not changing targets,if you have a weak weapon,but if you have an explosive then shoot where the enemies are in majority
When facing a strong opponent:If your health is low then try get away from him or her or use a ''one shot one kill'' weapon
If you have any more questions then do not hesitate and ask or if you have any better opinion