Ok so I m back. Firstly I play on Europa. I indeed sometimes notice people on chat begging all day long to get free faction points. Begging all day long on a virtual chat is not my playstyle.Yeah it sure is Hard to have a Pvper say "I honor your leadership" a hundred times.
Alt or GL i'm guessing, I played a little Atl, and would regularly get 200,000 Points per kill on Opposite Alignment Factions.
Also, A Vampire Template will not have Life Leach.
A Curse Weapon Template will not have Life Leach.
A Wraith form template will not have Mana Leach.
DI is subject to a 300% Cap (Meaning Chiv OoN / Perfection is 200% Right there, Add in 40% From your weapon, 20% From your Tali, and your 20% From Cap without Slayer on a Weapon)
I honestly dont think you know what you are talking about anymore.
About the leech form, first of all, you seem to not know that you don't leech mana from a target that doesnt have mana, with wraiths form. If your targets don't have mana then hit mana leech is the only way to get mana back. And again in many compartments of the game the life returned from vampire form is not enough. So it's really sound that 15 HCI on a weapon is a wasted slot (you cannot get the leeches on any other part).
There is no 300% cap on DI. The cap on DI is 100%, no matter you're doing pvm or pvp. The difference is that there is a hard cap on the amount of damage you can make in pvp. If your weapon has a base damage of 15, having 0 DI from items means you will lose 45 damage per hit once you take into account the damage modifier bonus of 300%.
That damage modifier bonus is a different thing from DI. Note that I call it damage modifier but I m not quite sure it s the same than the one on the quiver, even though I believe it is (thus making the damage modifier bonus from quiver kind of bad). The damage modifier bonus is delivered after everything (stat, skills and DI bonuses). It is capped at 300%. It comes from the slayer or killer properties, EOO, and honor (and other spellcast if I forgot any). Since a *2 bonus +EOO = a *3 bonus, it s a quite easy bonus to get. A basic slayer gives you cap without honor or EOO.
To sum it up, the damage you deal is :
(1.00 - opp resist) * base damage [the one displayed on the weapon] * ( skill + stat + DI [capped at 100%] bonus) * 3 [Slayer bonus etc... see above]