Just try injecting 50mg of test every 3.5 days. That alone will lower your E2. Probably all you will need to do to lower your E2. If your E2 is still elevated after that change I would try .25mg of arimidex every 3.5 days. You could try less, but dividing those pills up any smaller get difficult unless you start pulverizing them.
For comparison, I take 100mg of test every 3.5 days and .25mg of arimidex every 3.5 days.