The Mailmen have so far claimed four points from their first two games and might go top of the table with a win depending on the outcome of other games. The coach is, however, anticipating a tough match against the Kisumu Powermen who he believes are prepared to cause an upset.
"Stima are a good team under a tactical coach as well and they will cause problems for sure," Omollo told Goal on Sunday.
"We have prepared to play them [Stima] and we are just focused on getting a win and continue with our good early run. I have been impressed with the character of my players especially in the two games we have played, and Sunday is another test for us."
The former Tusker FC coach admits Rangers have to take their chances to stand a chance of winning the game.
"We created many scoring opportunities when we played Kakamega Homeboyz but did not convert them. It has to change against Western Stima, we have to be at our best in front of the goal," Omollo concluded.
The Kisumu based side opened their 2019/20 season with a 2-2 draw with Kariobangi Sharks before settling to a barren draw with Wazito last weekend.