Give Twisted Treeline, ARAM, and Dominion a purchaseable wardlike object that doesn't give vision.
Like for the love of god, this is one of the most annoying things about game modes that AREN'T summoners rift, is that techniques like insec and katarina ward hops can't be done due to the fact that THERE ARE NO WARDS.
These items don't even need to give vision, ALL THEY NEED TO DO IS PRACTICALLY LAST 10 SECONDS AND GIVE NO VISION. Like come on, enough is enough. DO IT.