Fighter clearance is how player predominantly use of Narn e-mines and if you intend to fight a "fair" battle with Narn then you're going to lose with standard Nial tactics (i.e. rely on high dodge and stealth to save you

)
I've seen players use fighters effectively against Narn before but they're careful about. The tactics are boiled down to this:
1. Wait for the window of opportunity - This one is pretty obvious but (assuming you are a Minbari player) you're likely to have the higher initiative so you usually have the advantage of electing to move your fighters first or after his fighters (and obviously all of his ship) have moved. Move the Nials just out of range of his e-mine heavy ships...and wait for a window of opportunity.
Windows of opportunity include:
a) When you can get close enough to an enemy ship or formation so as the Narn player electing to fire e-mines will damage his own ships or Frazi as well.
b) When the Nials themselves have a good chance of taking out an enemy ship of fighter swarm (remember that fighters fire first so even if he does take out your Nials you may be able to make that sacrifice worth it).
2. Distraction or Flanking:
Players often keep their ships and fighters together but there is no reason why you can't experiment - try coming in with fighters on the far flanks while your other ships make a tempting target for Frazi...with any luck he may ignore your fighters until you can get round e-mine firing arcs and come in from the flanks (as far as I know Narn e-mines are F arc only and slow sloading to boot...saving the G'Karith of course but it's Hull 4 which leads me to my next point...
3. Shoot the Bombardment Ships!
E-mines giving you real trouble? Shoot the ships that fire 'em! Not all Narn ships can fire 'em especially at standard 5pt Raid (admittedly the G'Karith is a skirmish level option and Dag'Kar is Raid not to mention G'Quan but...) usually an e-mine carrying ship is pretty frail and you should be able to keep fighters out of range just long enough to take out the main e-mine carrying ships with Neutron Lasers etc.
Short of it is....you can still use fighters but you have to time it right, don't charge into battle or you will just die - pick your moment and choose your target ships carefully. Good luck, I'm sure others willl have good advice too and let us know if any of this helps!
EDIT: Saying that I'm not sure if Burger's Minbo's have yet to beat the dreaded Narn bat squad...although that's a whole other can of worms with the PL system so won't go into that
