Originally Posted by TCWA Tigerbite
Stay out the bushes!
The fact of the matter is, Teemo has way too much lockdown on a map the size of Dominion--your only real choice to counter the 'shrooms fully is to avoid the jungle altogether, which is a gigantic advantage as it means no relic control, poor shrine control, and no chance to use any health relics either. Oracles isn't really that viable because of the death rate in Dominion and the duration is low anyway.
If he was only allowed to have, say, 3 traps, it would be a different story, but the duration of the shrooms is just too long for the damage and control they offer---and Teemo doesn't have to do anything to gain this advantage but place them.
Nid's traps are a bit different; they for her to take full advantage of them she has to follow it up with a nuke of some sort; Teemo gets the advantage purely by you hitting the shroom.
There either needs to be a hard cap on the number of shrooms allowed on the map, at once, or the duration is considerably lessened to the point you don't have to worry about hitting 5+ of them in a 60 second time frame.