Juggernaut Invulnerability

Supposedly, its meant to be 1.5 seconds of invulnerability after each kill and its meant to stack if you were to believe the livestream elves. So chaining kills 'should' keep it up, but i think in the thick of a fight, you probably don't notice.. 1.5 seconds is not that long.

There's three separate categories to consider when talking about the mechanics of this game:

1)How things are supposed to work
2)How things actually work
3)How things work off-host

All three can go wrong at any moment.

If you experience something that can possibly be the result of lag and/or bad netcode, in this game that's probably the cause.

Invuln works as it would seem - 1.5s invuln right when you get a kill. If there's lag, it may either delay the 1.5s or parts of the 1.5s may not happen because the host didn't register it.

Fair point.  I like to wander around the map without any regard to where my teammates are roam so Invulnerability has been extremely helpful for those situations when enemies sneak up on me.

You can still get grabbed by the dogfishes, stunned by berserkers and everything else and generally ragdolled at will, so this invulnerability is not that useful IMHO. And it is heavily lag-dependent and sometimes looks like it does not trigger at all.

If you are sitting back camping, then maybe it isn't needed.  But if you are a front line player, especially on Platinum, then it is a no brainer to take Invul over any Shockwave ability.    Not sure how else you would play the H-Jug, though.

You didn't state whether you have only one point in Shockwave, or if you mean the Rank 6 Evo.  Regardless, its an ineffective skill in terms of DPS, unless you strictly play on bronze/silver.

It's when moving around in Platinum I find the Shockwave combined with  most useful. Invul sounds great, but there's often too many enemies living too long for it to be as useful as in Gold and lower.

The Lifting Shockwave/Explosive Purge/Brittle+Anti-Armor is very useful, on the other hand. This build requires speed and some half-decent timing, though; doesn't take a huge mistake to look foolish. Power Efficiency booster is useful here. Basically: Run into victims -> Explosive Purge -> Shockwave -> Snap Freeze -> Shoot -> GTFO -> repeat. That takes care of redbars, shielded redbars, and the lesser yellow-bars. Kro-bros goes down with repetition. Boss units takes a bit more time; sneaking in a Shockwave before Snap Freeze runs out for cryo explosion is helpful (usually SF->Shoot->Shockwave->repeat).

Interesting.

So how do you have your points allocated? 

My issue, is a lot of the times, your Snap Freeze gets detonated by someone else, or it leaves you exposed.

I did a non-traditional setup, and skipped some of the level 6 power abilities and went strictly DR and Weapon Dmg.  Initially I went power damage in Apex, and it didn't seem to make much of a difference overall.  I typically roll with a Shorty.

Snap - 4B, 5B
Fort - 4A
Shockwave - 4B, 5B
Apex - 4A, 5B, 6A
Armor - 4A, 5A, 6A

->My fully viable Gold build <-

-> My current Juggs build. <-
Apparently slightly unconventional since I haven't seen it much around, but it works for my style. Obviously, it isn't a build to stand around tanking. Nor to survive endless abuse while running and gunning. It takes enough punishment to get close and stun, detonate and immobilize enemies so you don't get hit. Then finish what's left of them and/or GTFO. Speed is important; it's when I'm not running my Juggs tend to get slapped, and gravity pulls them to the floor.

APEX 4a is more important than weapon damage here; it makes the Explosive Purge, Shockwave and Snap Freeze kill lesser enemies outright or at worst leave them frozen with only a sliver of health. I'll equip either equipment or booster to increase power recharge by at least 15%. Main reason: Get back Fortify ASAP Secondly, to reduce Snap Freeze & Fortify recharge time.
Snap Freeze 5b & 6a aren't essential, but I find it makes a difference overall. True, detonation by others is an issue. However, against the lesser armoured units, detonation matters not at all since they tend to die before someone has time to throw powers. Against bosses, with improved recharge items detonation also matters less. Just re-freeze anything at once; in fact, the Shockwave doubles as SF detonator. SF exposure is inconsequential, as my Juggs is already exposed - in the middle of a crowd of dead, floating or stunned mooks. A bit of ice, and a bullet to the head, is all it takes to make anyone standing... not.
Finally, my reasoning for selecting the health and shield recharge is to spend more time running, and less time hiding for shields to recharge, but not sure it really matters much. Planty of room to play around.

Nice thing about Juggs in any case is that there's no real need to consider powers/weapon/speed/etc. outside Platinum. It'll work just as well in Gold and below, so only one build to suit your style is needed- ^_~