Now the BRV Fighter has to keep track of two pools of THP.
you and a few others have had this confused by thinking that there are two pools of THP for the BRV fighter. This is incorrect. You simply have one pool when THP go in and you are a BRV fighter you ask one question "did these THP come from an invigorating power?" If yes add them to the total if no then like any other THP ask another question which is "is this more than the amount of THP i already have?" If yes reset the total to that number if no then ignore them. It is that simpleThe BRV makes Temp HP more of a headache than before, but some of it is down to interpretation.
Pre-MP it was rather simple. THP never stacked, so whenever you gained THP and already had some, you simply asked which was the higher number: your old ones or the new ones, and that became you new THP total.
Now the BRV Fighter has to keep track of two pools of THP. The first one works as before, and includes THP gained from the first part of the class feature (i.e. being hit) and from any powers or other sources that don't have the Invigorating keyword. So if, for example, your 18 Con fighter is hit in round 1 and gains 4 THP from that, then gets hit again in round 2 by a weak attack that only does 2 damage, he does not end up with 6 THP, this pool is simply "topped up" at 4 again. And if he used a power like Unstoppable and ended up with a lot more than 4 THP, then this class feature would not come into play at all until the pool was brought below 4.
However, this same character can get another 4 THP each round he hits with an Invigorating power, and these have to be kept track of in a separate pool, since per the second class feature, they stack with any other THP. Now, the keyword limits this to happening once per turn, but a really literal reading of the class feature would let them stack with each other. It says "stack with any other temporary hit points you already have", without specifying that they need to be from another source.
As DM, I would quickly nip this in the bud and make the ruling that you can't accumulate THP in this pool, but that it also tops off at 4.
What I'm less certain of is the situation where the BR Fighter has 4+4 THP and is hit for less than 8. Which pool/s do you subtract the damge from? I think I would let the player choose, because that puts a tactical decision in the player's hands.
Of course, that is simpler, but it leads to Invigorating THP being cumulative. Which is precisely the problem I wanted to avoid, it being unbalanced, overpowered and a really really cheap trick.you and a few others have had this confused by thinking that there are two pools of THP for the BRV fighter. This is incorrect. You simply have one pool when THP go in and you are a BRV fighter you ask one question "did these THP come from an invigorating power?" If yes add them to the total if no then like any other THP ask another question which is "is this more than the amount of THP i already have?" If yes reset the total to that number if no then ignore them. It is that simple

The invigorating THP being cumulative is not that strong at most levels against a balanced encounter as laid out in the DMG.Of course, that is simpler, but it leads to Invigorating THP being cumulative. Which is precisely the problem I wanted to avoid, it being unbalanced, overpowered and a really really cheap trick.![]()
Now the BRV Fighter has to keep track of two pools of THP. The first one works as before, and includes THP gained from the first part of the class feature (i.e. being hit) and from any powers or other sources that don't have the Invigorating keyword. .
Also, if I weren't a battlerager-type fighter, I would have a higher Strength (because I would not need the super CON) and I would be using a sword rather than an axe. So, in reality, we're looking at a difference of 3 to hit, not just one. I'd also be wearing armor better than chain, and would have chosen powers that are better than then invigorating ones. It's not just a matter of choosing battlerage vigor instead of the +1 to hit with a weapon - it's a completely different build strategy, making the cost higher than just at single bonus to hit.
when it comes to the BRV if the DM is lazy with his encounters it is very very strong but if you do what the DMG tells you to do then it is quite balanced at that point. Meaning you should not have any encounter with just soldiers and brutes

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.