Well, that was an interesting turn. No attack on the Jungle seems outright insane to me. Called the Cannalans making a new jet, but not the carrier capability, and they didn't use their Expense Credit on it. A bit salty that the Cannalans apparently only rolled a 3 on their jet design, and yet it's almost on par with the Thunderbird, and the un-[Complex] of their turboshaft engines carried over into the jet's turbojet engines as well. Also, for what it's worth, the Spearhead seems to have brought the Cannalans back to air parity, as it's mentioned in the Plains section. Bringing the Thunderbird down to Expensive would give us back air superiority, although the Cannalans could spend the Expense credit and restore the balance.
Anyway, can't decide between the coastal artillery and better radar. On one hand, coastal artillery would definitely ensure we keep the Jungle into next turn. On the other, centimetric plane-mounted radar would greatly boost the effectiveness of our fighters, and could be applied to our carriers, destroyers and ground forces as well, perhaps offsetting the Spearhead.
An alternative plan would be to spend the design on a new twin jet-engined Haast with larger centreline autocannon, larger bomb load and possible rocket pods to un-[Complex] the engines, then spend the revision on either the Archer or improving our radar.
P.S. I think Tauricus named it the B3 originally, because we previously had the B2 destroyer. Not sure what B stands for, though.
Edit: The Haast is a CAS plane, confusingly named a F39 fighter. I think HAFB is High Altitude Flying Bomber?