Kanes Wrath

Hi, I need help.
Im playing vs brother and he is much better player then me. Every time when he build Ion Cannon i know that is my end because i don't know how to destroy cannon.
When i create Stormriders he will destroy them with AA Guns or with anti-aircraft tanks.

EDIT: Im noob

Mass reaper tripods and send them into the enemy base in mass.

The are no Ion Cannon direct counters in the future for some reason. Back to future! Nowdays each country has counters for missiles/satelites.