Here is the timeline I see for Oyl and the Plant Spirit in the (pre 1) list, based on the IC and instructions to the Spirit:
1.1 Oyl Instructions to Plant Spirit
1.2 Spirit goes to Citymaster in astral
1.3 Spirit Concealment (astral IP) (sustain 1)
2.1 Spirit Materialize (sustain 2)
2.2 Confusion (rigger) (sustain 3)
3.1 you have as non damaging engulf rigger, Spirit decision I guess. I figured skip this as long as rigger still in VR/asleep (sustain 4). It does seem the safest course with the instructions. I was not sure how RAW would treat something like using engulf in place of subdue/hold. I guess a 'touch' attack, for no damage, then hold but don’t “squeeze”.
3.2 Fear Tac Op
4.1 Fear Winter
4.2 Engulf/Melee Tac Op (already detected, drop concealment) (sustain 4)
5.1 matches 1.1 for the WIP post. With the communications delay, I expect the Spirit to get the status update here, but after it has already acted, so it will attempt to attack/engulf Tac OP or Winter. Probably Winter, if 4.2 Engulf succeeded, since that will continue to do damage while sustained.
5.2 = 1.2 Fear rigger
6.1 = 2.1 work on getting rigger unconscious, and defend against whatever Winter is doing, then continue attack on Tac Op and Winter, unless they have left. If Winter is attacking, could choose to attack back while putting the squeeze on the rigger? The instruction say quickly though, so squeeze and melee attack on rigger might seem better.
3.1 Tac Op will need to succeed on WIL+CHA(3) (net hits on Fear) to able to return/face the Spirit SR4A295
With the mage and others at the breach, a rocket strike there does not seem like a bright idea

Is the thermal smoke going to add to the existing heavy fog/smoke modifier? If it just increases the modifier for thermographic SR4A136, Fido can just ignore it. He is using low-light.
Attack of Will SM94 Banishing+WIL or just WIL, base DV CHA(P), melee attack
which could apply to the Plant Spirit and Winter too. For now, Tac Op is busy with the door, if he is not engulfed and trying to get out of that. Add a little claustrophobia to the Fear
