All those points are covered in the rules

Steel-Rabbit wrote:
1) BPs. Units like the Basilisk have an attack die rating of "2 BP@" with a variable to-hit roll. This is because you combine them with other units, total up the BP, and cross-reference the chart on pg. 35 of the NetEpic Gold rulebook. Now, what about things like the Thunderbolt's Rockets which have "4 BP" but don't have the "@" and their to-hit roll is a number (5+ in this case). How do you resolve those? Do they still involve the 6cm template? Do they use the chart on pg. 35?
You must combine @BP with other models in the detachment. Basilisks have @2BP so a each detachment of 3 basilisks can place a 6cm template and to hit is 4+ as combined fireposer result in a @BP6. You can not combine with models that are not in the same detachment and you can't divide firepower: you can't place 3 templates with @BP2 each instead of a single with @BP6. Weapons with just BP (not @BP)do not combine and each model can place a 6cm template within range and roll to-hit with the BP value (each thunderbolt can place a 6cm template and to-hit roll is 5+ as thunderbolt weapon is BP4).
Steel-Rabbit wrote:
2) what does ROF2 mean? I couldn't find any mention of it in the rulebook.
ROF2 = Rate of Fire x2. Each basilisk detachment can fire 2 times in the same activation.
Steel-Rabbit wrote:
3) Flyers seem really, really, good. In my last game my opponent had 9 Thunderbolts and they just pointed their guns at a detachment and it died. Do flyers suffer from needing the extra 25cm range if they're flying at high altitude? What's the benefit of flying at Low Altitude vs. High?
Yes, they are, a little less with alternative flying rules. Flyers do not suffer the +25cm range penalty, this is for units in the ground that have to do with gravity while flyers don't. Flying low: you can hide behing a cover as a building for example. Flyer can not be seen everywhere on the table but he can not see everything too. At high, it can see all the table and can be seen by all units but they will suffer the 25 cm penalty to shoot at it. In my player group, flyer at low altitude do not benefit from "Shoot the Thin Part" as they are considered at a "titan" height altitude and even the imperator top weapons do not benefit such a bonus.
Steel-Rabbit wrote:
Thanks again for answering any questions!
I hope my answers will help you
