Assuming the Idris has similar shields to the 890 (it actually has more), just the recharge rate is 14224 hp/sec. That means you can have 5 ions pounding at it forever and wouldn't scratch it :OI agree attempting to dog fight in them will be a terrible idea. I am also not sure if they will be that effective against large capital ships like the Idris, Javelin and Kraken vs bombers like the Eclipse. Or if it would simply be fare more effective utilizing a Retaliator.
Not to mention it's shield sits at 1.5M hp. I think when they say Ares are meant for "Capital Ships" they are referring to the Polaris (not Idris).
I agree, for Idris and bigger you probably need to use Retaliator or Polaris.