Far Cry 6

You can complete this solo,

This is how to defeat the Mesozoico Special Operations on Mastery 3 solo.
The equipment I used is
Gladiador Supremo
with C4, Healing Syringe, Grenade, EMP Proximity Charge
Mods, Rush, Sharpshooter, Supremo Extender
MP7
with Armor Piercing Rounds, Small Compensator, Red Dot Sight, Laser Pointer
Mods, Headshot Supremo, Gut-Wrencher, Reload All
MGL-6
with EMP Grenades, Reflex Sight, Laser Pointer
Mods, Reload All, Nimble Shooter, Gunslinger
La Varita
with Triada Mode, Killer's Covenant, Falcon's eye, Scorched Earth
Desert Eagle
with Armor Piercing Rounds, Large Rectangular Suppressor, Red Dot Sight, Laser Pointer,
Mods, Headshot Supremo, Gut-Wrencher, Reload All
The Gear is
Parkour Cap, Parkour Hoodie, Prisoner's Pants, Parkour Kicks, Parkour Strap

Just stay shaded and keep cool

You can view it here