Your tic size is dictated by the Twos, which are of course 'quarter of a 1/32nd'. So, quarter tics. You can write a little file to standardize the tic size across all three instruments (1/4, 1/2, and full 1/32nds all standardized to quarter tics). CQG has a nice price-to-native-currency feature.
Just to be clear, the 2's and 3's have a $200K notional value, so your price charting is ratio'd differently than your executed quantities.
So, chart at 3.3332 - 2.6668 + 1 but execute at 5 - 8 + 3
Why not 2s-5s-10s ? Looked at 10s-30s-Ultras ?
Leg your TuT and then leg your NoB. Don't get cute - just try to split the difference and be done with it. Better yet, use those orgasmic exchange-supported implied spreads.