By any chance, does anyone know how long haste, reinforce, fang break, last will last?
the TU…
& in case anyone wonders, I just did experiment, reinforce & last will don’t stack. (thanks to icekoo)
Doesnt it say that with the description?
no it doesn’t 
This is Tajid we’re talking about, the guy with the Kamiwyrm everyone is jealous of, do you really think he would be asking if it were in the description?
Dont think that stat boosts and nerfs expire
Thanks 
I take that as a compliment.
& Jean, no, the description doesn’t say.
I know for a fact haste only lasts for specific TU, maybe 500?
Buffs and debuffs (haste, enrage, poison, etc; basically the active skills) do have TU, but I’m uncertain about passive skills.
Active skills are generally 500 iirc.
Hmm…nobody knows about passives, I guess…interesting.
And they don’t stack? Wow. They really should…
…/posts in suggestions section.
Bolster seems to last very short amount of time though?
suggestions?
Just saying that a passive and an active boost-move should stack once.
And it does? Idk, it’s been ages since I’ve PvPed…well, a week and a half-ish…idk, maybe bolster is different. There should definitely be a description for active skills. No reason not to.
In fact there was a debuff that stacked and it caused some balance issues (it’s fixed now). I’m not sure if that would work.
From experience the effect lasts forever unless specified (e.g. Haste). Each Ark can only have 1 status. Say you have got Last Will. If you then hit a Plasmorex, the Acid Body effect will replace Last Will. That’s why I usually avoid my Last Willed Shadowstalker to touch any of these, and Last Will seems to last until it dies or affected by other status such as Last Fury.
Having said that, if above is correct, I don’t know how it works with Charsima.
“Haste - This ability targets all Arkadions in your party. Increases speed by 38. Time Units (TU): 100”
No specified duration whatsoever, yet we clearly see that it runs out.
And I have used Halopard to Haste and Reinforce before, and it works fine for me. Therefore, Two DIFFERENT Actives definitely work together…I don’t see why two different passives wouldn’t as well. (Last Stand and Last Fury)
Just did a test in PVE, Reinforcement lasts ~1000 TU.
Also after a few uses haste seems to stop stacking . I’m not talking about the bug where the reduced number of TU doesn’t show below each move although that can sometimes hide this. I mean that after a few uses the TU cost will stop decreasing at all
Ironically haste does not decrease the TU of haste. 
Though, I wasn’t aware haste stacked. I was under the impression they were unstackable.
They (haste & any same buff moves) are unstackable. Imagine if I can use Stasis after a few stackable hastes?? Or stego’s stun only costs 50 TU?
They were stackable in DIB though. So when it didn’t in HI I assumed it was a bug
do not talk of such horrid nightmares