Tbh in this scenario everything screams at me to just trade Cal against neo and to put brother in SL. That would be the easy way to victory for a p2, but it felt boring and I want to have some skin in the game on whether you really did tech OS or not 
XCAFS23 FINALS round 9 part 1 P2T2
P1 [Past]/Present/Future vs. P2 [Finesse]/Feral/Present
Link to all relevant rule changes
Tech StartingHand Workers
TECH
Immortal (5/5)
Immortal (5/5)
STARTING HAND
Wither
Timely Messenger (1/1)
Older Brother (2/2)
Spark
Bloom
WORKERS
Fruit Ninja (2/2)
Spark
NextHand
Brick Thief (2/1)
Immortal (5/5)
Older Brother (2/2)
Wither
Granfalloon Flagbearer (2/2)
Tech 2 card(s)
Get Paid + float - ($7)
Worker - ($6)
Bloomed Cal kills Fargo, you gain 1 - ($4)
midband Cal heals - ($2)
tech 1 - ($0)
Float ($0)
Discard 3, reshuffle, draw 5
Board Info:
In Patrol:
Squad Leader:
Elite: Tenderfoot (1/2)
Scavenger:
Technician:
Lookout:
In Play:
- Cal (4/5, lvl3)+
Buildings:
Base HP: 20- Tech I HP: 5
Economy Info:
Cards:
- Hand: 5
- Deck: 4
- Disc: 0
Gold:
- Gold: 0
- Workers: 7
Thoughts
the only bummer is that with the Cal trade line my probability to actually have a tech 2 unit in t4 would be way larger, while it is slightly larger in this variant to actually have an immortal and not any tech 2 unit in hand.
If I were him I would tech two Argos after announcing OS and against these Cal definitely is my preferred option.