You have creeps/ranged heroes (if you don't play a terrible pub) on your side. They can destroy mines with one hit. I don't see a problem here.
And scouting/warding is very effective, too. You will know where Techies has his mines and where NOT to go. Yes, you can use your brain. You don't really HAVE to run in his traps.
And scouting/warding is very effective, too. You will know where Techies has his mines and where NOT to go. Yes, you can use your brain. You don't really HAVE to run in his traps.