Hey,
about your land base, are you sure
Flood Plain,
Temple of Enlightenment,
Temple of the False God are worth adding?
Flood Plain may seem nice for color fixing, but I think color fixing shouldn't be a problem with duo.
about
Temple of Enlightenment: im not sure the scry 1 is worth the downside that it enters tapped.
Temple of the False God is, at least for me, a noob trap. It looks nice because you can get 2 mana out of one land. But you have to play 4 other lands before you can use it. that means its a
dead land until turn 5 (assuming you can play 1 land every turn). Especially on the opening hand it hurts more than it gives you.
Then, why are you not using some cheap mana rocks?
Azorius Signet,
Fellwar Stone Sol Ring,
Talisman of Progress and
Mind Stone would be good and budget friendly options. If you can make use of colorless mana,
Thran Dynamo could also work great.
Since you have already added
Isochron Scepter, what about
Dramatic Reversal? With some Mana Rocks and
Capsize you could basical end the game, since you're able to
capsize the whole board at instant speed.
Another (but a little more expensive) win con that would fit to Augustin would be
Sphere of Resistance +
Mechanized Production. With every turn passed it will be more difficult to stop this combo.