Let me help put things into perspective...
Running a 4WD Slash against TEKNO or TLR is like taking knife to a gun fight.
Running a 2WD Slash against TEKNO or TLR is like taking a toothpick to a gun fight... no joke :(
The tires I see pictured above are no bueno.
You didn't mention the track...
It takes a squeaky clean driver to be competitive with a Slash, there was a pro level driver who showed up with a Slash and cleaned house in a ROAR Regional event around 2015 in my area. What made his setup so successful was that the event was on a small 1/10 track without big air on a high...