I would say no. Not even with RNG. Without Embo your only chance of taking down Nest are Thermal detonators.
In theory, Dengar should be enough, as Greedo's input of one extra detonator does not really turn the tides. If anything, he'll get your team down faster if he goes on a multi-attack spree and makes Nest counter a taunting Bossk to oblivion. Zam is also bad, as her basic makes thermals explode. If Nest has protection up, your thermals go to waste. The whole point is letting Nest take turn while loading her up with thermals that explode when her bonus protection resets.
Returning to the problem with your team, at the current gear level your Dengar is extremely squishy, and it's not likeltly that he'll survive long enough to place enough detonators to kill Nest. I have my whole team at G12 (zzBossk, Boba, Greedo, Dengar, Cad) and I can only 1 star the GB event. Their modding is also decent, most of my hunters having close to or over 100 extra speed, from potency sets (CD for Boba, tenacity for Bossk). You need that gear.
