Can a Tie Interceptor with Shield Upgrade (Mod) also take the Angled Deflectors (Mod) Upgrade?

Yes, I believe so.

Other upgrades are only ignored for the purposes of calculating what cost a variable cost upgrade is.

It's a TERRIBLE idea, FWIW. Reinforce is almost never goign to be worth using on a Squint.

It is technically possible, yes. Some upgrades added to a ship can enable other cards to be added that are normally restricted. So (in the app) as long as you put the shield upgrade on the ship first, that should enable Angled Deflectors to be equipped to it.

4 hours ago, thespaceinvader said:

Other upgrades are only ignored for the purposes of calculating what cost a variable cost upgrade is.

Curious, how is this relevant?

4 hours ago, thespaceinvader said:

It's a TERRIBLE idea, FWIW. Reinforce is almost never goign to be worth using on a Squint.

Uahgreed. Its going to be a poor choice on a ship with 3 agility, and FFG knows this, which is why its cheaper the more agility the ship has. For small ships, it will be better on ships like the HWK, or a Y-wing (if you have the points, 6 on a Y-wing is a fair amount)

It's not except that one might think that other upgrades would be ignored for this purpose as well and I wanted to confirm that was not the case.