Range is 2400...

I'll advocate the flak burst I like the most...

Periodic AoE with range 4000 or so...debuff of -25% accuracy or so for only targets in range (if they move out of range, debuff stops)...I have DPS numbers in mind but they are for a mod where SC have very different HP so those aren't going to be helpful for vanilla sins...something like maybe 10-15 DPS would be appropriate...key difference between levels would be range and duration to cooldown ratio...

This is a completely restructured ability that is comparable to TK push in that it does a fair amount of damage while also providing some sort of cover....I won't claim this structure is perfect but I've played with this version of flak burst for a quite a while and been happy with it...

I've seen a variety of numbers thrown around here for accuracy debuffs and I have a few comments:

• Context is everything...what is the duration of the debuff?  What is the stacking limit?  Do targets keep the debuff even if they move out of range? 
• Even for a stacking debuff (where any given SC is likely to have at most 3 flak bursts on it), a small number like 5% is fairly useless...consider other abilities like vertigo or other things that reduce incoming damage (such as a cruiser ability that reduces damage by 33%)...a 5% debuff, even if stacked 3 times, just isn't going to be doing a whole lot...

A ~15% reduction in incoming damage coming only from some of the SC for a very short period of time just isn't very tantalizing...if you aren't changing flak burst in any other way (ie it does the same amount of damage and is instant action) then small values I suppose are fine (since the ability is still pretty good), but if you restructure the ability then you are gonna need a decent debuff value...

Purely from a competitive gameplay stand point, the biggest issue with flak burst is not its power, but its utility...the ability is AM intensive and has limited use at low levels (compared to TK push which is useful at all levels)...the absolute simplest change would be a AM cost decrease, with maybe costs of 85/90/95/100 instead of just 100 for all levels...I like having the accuracy debuff, but that's not a change likely to be implemented by the devs...an AM cost decrease is something the devs may actually consider....

I have been playing with the under-dogs: advent loyalist for some time and i can truly say there is a-alot of trolling going on here.

For starters bombers is not the problem-corvettes are because when you complained about bombers then the devs decided to give us an even more buff bomber that kills bombers-and everything else. Its no secret corvette counters bomber massing and escapes flak if there not in a tight formation. 

That said- bomber massing is not a problem in a fleet composed for different roles-- flak and corvettes. Where the other races have low flak dps at 75%, advent flak is dangerous against bombers at a maximum 29dps that is achievable by tier 4. 

Further more loyalist are more likely to be less affected with bombers due to disable targeting,vertigo, shield projection, suppression aura, mitigation in culture,TK and stealing anti-matter from carrier cruisers. These are all damage reductions so they don't receive the full wave of attacks . With rebellion bombers are not the issue. The issue is surviving corvette spamming while working towards building light frigates, lrm to carrier and hc if not a titan. 

You need to open with a defensive fleet then an offensive one. Meaning your opening with flak and corvettes then titan or light frigates, long range frigates, carriers and heavies. You cant build enough bomber squads to survive a corvette rush in the early game. 

The bomber situation is mitigated by corvettes and units like carrier cruisers are late game builds or units you build when you opt not to build a titan. How fast you roll out carriers depends on your economy because if you kid yourself into building only a handful then you suffer the wrath of the titans.