first things first... do you really know how to split dice pools on dual wield?
I know this is a highly discussed topic but afair state of the rules is:
you split agility+skill because it's the dice pool (annd thus for not likely 20) and then you add and substract everything else because it's a modifier
so for example: SMGs 6 + agility 8 is 14 which you can split from 1/13 to 7/7 to 13/1
and then you add: off hand penalty, spezialisation, tacnet, situational boni, recoil, sight modifiers, tracer ammo, ... and the like
the way would go is:
get 2 fully recoil compensated weapons (you are short on dices anyway compared to a non dual wielder) and use them in full burst
that means you need 8 RC which is possible... it's a shame though that one can't use 2 ares alpha for this
things that add nicely to this concept:
ambidextrous (effectively 2 more dice)
adept centering:(effectively more dice which can replace ambidex, sight mods,RC, if initiate rating is high enough)
tracer ammo: (+3 dice on dice pools with full auto and with gas vent you can't silence anyway)
I got a fun char concept (that is not mission compatible because it's a possession tradition) with 6 SMGs which are fully recoil compensated here:
http://forums.shadowrun4.com/index.php?topic=7011.msg124547#msg124547my SMGs look like the following
FN P93 Praetor w/ Electronic Firing
+Gas-Vent 3 System
+Stock
+Underbarrel Weight
+Electronic Firing
+Flashlight, Standard
+Heavy Barrel
+Sling
DV: 5P AP: - RC: 8
I actually can't remember if the Sling is usefoll for RC or just a don't get disarmed precaution but it adds up to 8RC and you can easily get the last 1 RC by strength 6
then go fire 9 full autos at once and devide if you want to have 2 times a +9 damage attack or like 6 short bursts with -2 to dodge or +2 damage each...
if you fire 6 short bursts at one enemy he gehts -1 for each subsequent hit so the last could come in at -7 to dodge
imho you cannot long burst two weapons at once but you can full burst two weapons at once and gain 2long and 2 short bursts
if you want to play this character for a long time you can go for adept or latent adept (and save 1 to 1.99 essence) and later on when you have the adept centering high enough go for a high velocity mod and compensate RC with adept centering
edit:
this clearly dosn't work with full auto bursts
you can do a long burst with all your weapons and then a hort burst with all your weapons getting to 8 recoil and therefore you need one less recoil compensation
mea culpa