How many stacks for briv to get through 1500 areas?

[JC]

So i learned that you need the steel stacks, and as they don't really happen when your blasting through, you need to micro it late in the mission. So my Q is how many stacks do i need to make his double jump work to around 1500 or so

[kab_reg]

With 4-jump Briv, don't bother. With 9-jump Briv, about 15k.

[Derpykat5]

At 4 jump you need 833,444 stacks. At even lower jump values... yeah, I wouldn't bother.

[JC]

the problem i run into with him though, is he ends up with no stacks so he doesn't jump at all.

[kab_reg]

That's why it's a good idea to swap Briv in only for the last segment of your run. For example, for z2000 runs I swapped him in around z1400. And don't forget to charge him up afterwards.

[LostSoul]

Originally posted by kab_reg:

That's why it's a good idea to swap Briv in only for the last segment of your run. For example, for z2000 runs I swapped him in around z1400. And don't forget to charge him up afterwards.

I charge him up around the same time I swap him in. He runs into survivability issues if you try to recharge him too far in. Even with Tyril to bolster his health pool, at z2000+, regular enemies eat a 4j Briv alive, let alone the number of them it takes to rebuild a decent number of stacks quickly.

[kab_reg]

Yeah, I know. I usually charged him afterwards around z1300.

[LostSoul]

Originally posted by kab_reg:

Yeah, I know. I usually charged him afterwards around z1300.

Backtracking 500+ zones. Ick. The UI definitely wasn't designed with that kind of thing in mind, that's for sure.

[Hecate]

Yup backtracking out of area 1 is a real pain. You can calculate Briv stacks needed with the speed page in byteglow, even if your account is not registered on it (just enter manually your values & feats).

[JC]

So i can just toss him in at the end of a run to make sure he is charged for my next use? That is good to know. I'll have to remember that, because it's so annoying to be able to use him to breeze through a run only to have him at 48 stacks!

[kab_reg]

No, he usually does not fully charge up automatically. You have to spend some time charging him up by removing unnecessary champs from your party. The sweet spot to do it depends on Briv's ilvl. As I mentioned above, I usually did it around z1300 and charged him up to 10k stacks. Your sweet spot now will probably be much lower.

[JC]

So i can yank everyone out of the formation and add some lvl's and just let him stack stuff up right?

[kab_reg]

Yep. You can also add Tatyana and Melf to get more enemies faster.

[alo_obert]

You can also have an alternate party stopped at the optimal max area of your convenience to recharge Briv and insert him there when you need to.

The only cost is losing an active party for a while, but it pays out if you are doing several Briv runs.

[kab_reg]

There is usually not much reason to recharge Briv separately, apart from a few specific variants.

[Hecate]

For some (not) useful maths:

Gaining an order of magnitude on Briv stacks gives x jumps:
As log(10) = 1
Without spec: 1/log(1/0.96) = 56.41
With spec: 1/log(1/0.968) = 70.80

You can sum your jump stats and the not jumped zone and that'll give you the amout of areas you can reach. (eg. a 3.275j Briv will do 4.275×70.80 = 302.67 areas per order of magnitude of stacks). For the total, divide the stacks per 49 as it's the floor value (or use log(stacks/49) as a coefficient).

et. that 3.275j Briv will do, with spec, with 12500 stacks:
1/log(1/0.968) × (3.275+1) × log(12500/49) = 728.42
→ around 728 areas in average

Now to convert the equation to rather give stacks as a result:
log(stacks/49) = area goal × log(1/0.968) / (jump+1)
stacks = 49 × 10^(area goal × log(1/0.968) / (jump+1))
stacks = 49 × 10^(area goal × 0.014125 / (jump+1))

eg. you want to go to area 1500 with a 6.35 Briv, with spec:
49 × 10^(1500×0.014125/7.35) = 37398 stacks (average)
Or for more common value, with 9j
49 × 10^(1500×0.014125/10) = 6440 stacks
with 4j
49 × 10^(1500×0.014125/5) = 846635 stacks
with 1j
49 × 10^(1500×0.014125/2) = 1.92e12 stacks

And with 2j (as I think OP's double jump means — I just seen it):
49 × 10^(1500×0.014125/3) = 5.6e8 stacks

Of course, you can go a bit below those values because of some rounding and the real floor value to use is slightly below 49 (and even below 48), but that wont change it much.

PS: Of course, those calculations are only valid on FP as Briv can't jump boss out of them (you then need a bunch less stacks).
Fighting boss on non-FP during a jump counts counter-intuitively as a skipped area for the purpose of the ability, so it makes no difference in stacks expense. But, for time saving purpose, try to align your landing area with boss if you're using a 4j (or 9j but that won't make any difference) Briv, so you won't have to fight a boss area and your landing area per jump but both being the same.
That way, if your landing zone is a boss zone, you also can avoid all bad buffer speed champions (Hew, BBEG, Melf, etc.) and focus on powerful supports.