A point beyond our reach, iirc. I believe this cap was stated as the point where we attack so fast and gain so much energy that we cannot use it effectively.

Can't you use both?

Frag Belt and Eternal Belt Bucket? I'm guessing I can't use both as it's the same with other enchants, thats why I wonder wich one is better than the other, or if it's even such a difference.

Taken directly from wowwiki:

Source: Frag Belt - WoWWiki - Your guide to the World of Warcraft

This does stack with the [Eternal Belt Buckle], but does not stack with other engineering tinkers, specifically the Personal Electromagnetic Pulse Generator.
This item shares a cooldown with other explosives, such as Saronite Bombs.
Note also that while the Cobalt Frag Bomb and Saronite Bomb both are described as having a 5' radius, the targetting indicator for the frag belt is much smaller than for the Saronite Bomb.

What up Zen. I’m at work and don’t have access to openoffice or excel on this computer, so I played around with your setup on idps and came up with a few potential solutions for you that get you back under or very close to back under crit cap. I can’t remember if you have Heroic Band of the Bone Colossus or not, but given your current predicament, it would certainly help if you did. Also, even if it’s just a temporary solution, swapping out Cat’s Swiftness for Icewalker would help, and being a LW, you could always pop Drums of Speed if you needed a quick burst and Sprint is on CD. Anyway, from highest dps gain to lowest, these are the setups you might want to try, the first two are by far the highest gain, with the last three being substantially less:

8 Rigid King’s Amber, Icewalker, Band of the Bone Colossus-H
9 Rigid King’s Amber, Icewalker (still slightly over)
8 Rigid King’s Amber, Band of the Bone Colossus-H
9 Rigid King’s Amber (still slightly over)
9 Rigid King’s Amber, 1 Rigid Dragon’s Eye (minuscule dps gain, you probably don’t want to lose the ArPen)

Anyway, cya at 8. Hopefully I won’t die so much tonight.

Ok so is that what the spreadsheet is already doing for me? Or is IP hardcoded to be on the MH?

I can confirm that you can indeed have both. I keep both on all of my belts, but I rarely use the cobalt bombs. Firstly because they have a cast time, which makes them definitely less than ideal for pve purposes, and secondly because they just do flat out less damage than the saronite bombs, which do not have a cast time. If you're interested in using bombs for pve, you want to use a Global Thermal Sapper Charge (note this is non-targeted so you must be standing among the mobs, near the center) followed by four saronite bombs, each bomb one minute after the previous. Sapper Charge, saronite, saronite, saornite, saronite, sapper charge, saronite, etc. Note the sapper charges require you to go with Goblin engineering, but you're not really giving anything up by doing so, so it's just assumed you are; at least in my mind. Some people don't specialize, or go gnomish for whatever reason, and their bomb rotation is simply always a saronite bomb, which is slightly less dps.

Edit: content removed.
following post has more accurate information.

I tried to beat around the bush becaue I hate to just contradict someone, Skellingtoon, but I couldn't find anything in your post that was accurate. So I'll just say it. :\

Two 1.4 weapons is fine; the only thing that matters is that you have at least one fast weapon, and the other weapon just needs to be the highest dps possible. If both are of equal dps, the faster one should usually go in your mainhand.

Do not bother with a training dummy, as its results are unlikely to give you the right answer especially when the delta is so small. Plug your gear into a spreadsheet and see which gives you better results. Socket bonus needn't be a consideration because normal heartpierce doesn't have a socket.

If both are within a tiny margin of one-another, I would suggest simply going dual lungbreakers. Not having the heartpiece proc up means you can devote less attention to not energy capping. The spreadsheet may show them as identical, but you'll have an easier time pulling off the spreadsheet's perfect rotation with a lungbreaker.

hi, I've been a silent reader for some time, and i want to thank you all for all the good work you pour inn here

this aside, I've been reading alot about having issues and trying to avoid energy cappin/pooling to much energy (as mutilate), this is where I'm raising a questionmark, because my experience (overall) is quite the oposite, i have issues pooling enough energy maintaining a 4+cp rotation as well as keeping my envenum uptime maintained, i feel i alway am sweating for those tics of energy to come in faster than they do cus my envenom is in alot of instances dropping off my target before i can toss in another envenom to refresh it...

anyone with the same experience of energy?

This happens alot in 10 mans and when i'm hitting the target dumby, but in a 25 man fully buffed raid i actualy have to be carefull that I don't energy cap.