"You might have started with it?..", Toros politely kicked the body of skitarii out of her way as it showered her with sparks and winced glancing at a barrel with her eyes half-closed. "I am all ears, lady".

It was not the first time someone held her at gunpoint. In fact, people loved having communications in this specific way - threatening violence to be in control over the situation. They always feel like you have no choice but to listen as you are held at gunpoint. 

There was always a choice. She made sure about it a long, long time ago, when she figured out that being held at gunpoint is an inevitable consequence when dealing with people of violent professions. Photon flash grenades, inbuilt into the gorget of her armour, detonated a second before their blind-out cousins, blessing the area with a violent flash of light before putting it into a complete hazed-out darkness. 

She wouldn't dare it against Astartes. The old hag was no Astartes. And it's not like a glancing hit from laspistol would have been the first or the last one she'll experience. Secunda knew her personal lodge rather well to operate blindly. It was a time to test the limits of the eidetic memory of this squad. Las-emitters in her arms warmed up, ready for wide-dispersal beams of punishing light. 

Pulverise the girl's hands first - gloves are underarmoured after the plasma burn, even if she's painwarded, the loss of operational capability would be sufficient. Crone should get a full blast center-mass, almost point-blank - likely enough to throw her away, possibly enough to incapacitate her, probably allowing using her as a temporary cover against the big guy, unlikely to kill her outright. Should buy her an extra second in case the big guy is tough enough to penetrate the fog or just sprays and prays like people of his caliber often tend to do under stress. Hence, creating a window of opportunity to reach for a plasma gun and check if her own insulation is up to the challenge. 

As she was diving forward through the chaos, she caught herself smiling. "Go with the flow". She missed these adrenal spikes ever since the war.