Sorry, linking a ss of a player in who knows what gear/situation at the time doesn't show anything.
I tried dummy tests (im well pvp geared + pvpwep) full mastery/crit reforge + full self buffs + demon soul + on use + pvptrink proc + tailoring proc (MAX procs) and it crits the dummy for 380k.
380k * (1-0.58) * 1.4 = 223k
(avg resil) (avg power with pvpwep + human + powegems)
This is a best case scenario with best procs/race/gems before any 15% mitigation that casters have, any defensive things used from other players, etc (which should always happen when they see you pop cds and glow red. And having all your procs up at the same time as you get a chance to burst with DS+on use is highly unlikely in an arena situation (coming from a lock playing at 2200+ atm)
The fact that your chaos bolt hit a player for 440k when my chaos bolt with max possible CDs hits 380k on a dummy shows that you were probably in a BG against a guy taking like 100% more damage while you had berserker. Just makes you lose all credibility and your making shit up. "during dailies"? sure maybe if theres a daily where your doing 100% more damage or the guy was taking 100% more damage, or both.