They are all true AoEs indeed, you should notice wugushi’s Throw Gu Pot got changed in KToS already so duration for level 5 should now be 9 seconds (we’ll eventually get that patch).
Throw gu Pot lv5 does 18 hits over the 9 seconds duration with 35’ CD. So, considering 2k physical attack, potential DPS would be (18*2781)/35 = 1430.
Broom trap lv5 does around 24 hits over 15 seconds with 40’ CD. Potential DPS would be: (24*2330)/40 = 1398.
Flare Shot lvl 5 does 30 hits over 15 seconds with 41’ CD. Potential DPS would be (30*2088)/41 = 1674. (PS. flare shot has an innate -10% physical attack multiplier).
Wugushi 2 also offers wugong gu lvl 10 for area damage (though not true AoE and, just like trhow gu pot can’t crit or activate circling attribute), for a potential DPS of: (30*3102)/25 = 3722.
At full, crit sapper 2 + scout 1 would be looking forward to something like 4608 DPS in terms of AoE damage, which can trigger Circling’s attribute with quite an easy setup.
An Archer 2 + whatever + wugu 2 would be looking forward to a potential of 5152 DPS from poisons alone, but they can’t activate circling attributes and wugong gu isn’t as easy to spread (mutlishotting original target or having a rank of hunter for coarsing makes it much more feasible).