Making sure I haven't misinterpreted a rule here:
A grav vehicle has a cruise speed of 1200 KPH. That's 10 klicks per Striker 30-second turn. To spot it from the ground is an 11+, so there's good chance of it flying through ground-based defenses without most of the defenders being able to react to it; high mode vehicles spot it fairly easily, but it spots them easily as well. Also a -10 DM to hit with direct fire unless you've got point defense fire control. When evading in flight, it's about a -11 to hit: 1/10 speed + G's. Size works against it: a scout-size model's probably a +2, a main battle tank or APC in the +3 to +4 range. Still, we're looking at an 11+ to spot it and a -7 to -9 to your to-hit roll.
Lasers get at best a +4 for autofire: a laser wll hit a scout at effective range on a 12 if fired by a regular.
Energy weapons get a better autofire DM but suffer power limits: a high-rate air-defense fusion gun may have a penetration as low as 50 and may not be able to penetrate the forward or rear armor of a reasonably armored target - and it may only see the forward and rear armor during that target's race through it's fire range.
Mass drivers can be effective, both high rate and heavy hit, though they'll take a good deal of power and a lot of mass in ammo to pull it off.
High Performance missiles can basically ignore the agility DM if their performance DM is high enough, and that's not terribly hard to do. However, operator guided, teleguided, and target designated missiles cannot be fired at evading craft or craft with a movement DM of 2 or higher unless the firing platform has target acquisition radar and, if there's effective jamming going on, that might not be available. That leaves homing missiles, which are subject to ECM and tech level differences: a TL14 homing missile facing TL15 extensive ECM isn't going to hit.
What I'm seeing is that the most effective tactic for penetrating defenses is to fly in high mode, fast and evading, accepting the occasional loss if you get too close to an enemy heavy PD laser or a radar strong enough to penetrate your jamming to launch a Target Designated missile on you - and of course kill the vehicle who gave his position away by painting you with a laser. Only place this might not ring true is near heavy defenses with access to a lot of ammo volume for MD guns, and even these might not be able to touch MBTs with heavy forward armor. And the only effective counters are either depth (put enough stuff between him and target that you get more chances for him to wander too close to something that can kill him) or speed (send up your own interceptors).
A grav vehicle has a cruise speed of 1200 KPH. That's 10 klicks per Striker 30-second turn. To spot it from the ground is an 11+, so there's good chance of it flying through ground-based defenses without most of the defenders being able to react to it; high mode vehicles spot it fairly easily, but it spots them easily as well. Also a -10 DM to hit with direct fire unless you've got point defense fire control. When evading in flight, it's about a -11 to hit: 1/10 speed + G's. Size works against it: a scout-size model's probably a +2, a main battle tank or APC in the +3 to +4 range. Still, we're looking at an 11+ to spot it and a -7 to -9 to your to-hit roll.
Lasers get at best a +4 for autofire: a laser wll hit a scout at effective range on a 12 if fired by a regular.
Energy weapons get a better autofire DM but suffer power limits: a high-rate air-defense fusion gun may have a penetration as low as 50 and may not be able to penetrate the forward or rear armor of a reasonably armored target - and it may only see the forward and rear armor during that target's race through it's fire range.
Mass drivers can be effective, both high rate and heavy hit, though they'll take a good deal of power and a lot of mass in ammo to pull it off.
High Performance missiles can basically ignore the agility DM if their performance DM is high enough, and that's not terribly hard to do. However, operator guided, teleguided, and target designated missiles cannot be fired at evading craft or craft with a movement DM of 2 or higher unless the firing platform has target acquisition radar and, if there's effective jamming going on, that might not be available. That leaves homing missiles, which are subject to ECM and tech level differences: a TL14 homing missile facing TL15 extensive ECM isn't going to hit.
What I'm seeing is that the most effective tactic for penetrating defenses is to fly in high mode, fast and evading, accepting the occasional loss if you get too close to an enemy heavy PD laser or a radar strong enough to penetrate your jamming to launch a Target Designated missile on you - and of course kill the vehicle who gave his position away by painting you with a laser. Only place this might not ring true is near heavy defenses with access to a lot of ammo volume for MD guns, and even these might not be able to touch MBTs with heavy forward armor. And the only effective counters are either depth (put enough stuff between him and target that you get more chances for him to wander too close to something that can kill him) or speed (send up your own interceptors).