Let's try something slightly different and a little less "Flame Inducing" like I've been seeing today.
Here is how it will be. This is as much about survival as it is about taking out the other party. The T-800 with Type-101 skin (Arnie) possesses a gattling gun as its primary weapon and plasma rifle as secondary. Gattling fires 6000rpm and carries a case with 18thousand rounds.
Machiko has her Yautja armor, equipped with helmet, plasmacaster, glaive, wristblades, a combat knife and a sword. All of which are made from the Yautja's own materials. Cloaking field is disabled so there is no illusion about the danger.
This is where they will be fighting. The ruins of Las Vegas from RE Extinction. They will begin 15km apart. And there will be zombies. And they are both aware of the zombies. Noise will attract them and in closer proximity the scent of living flesh will draw them. Which makes stealth useless. There are a total of 3000 zombies within the LV ruins and spread out. Evasion is the best option.