Feeding Frenzy Vs Eldar
The idea of blocking the exits for a Landraider with three Piranhas, and then penetrating it is a costly and unlikely event. But against Eldar this becomes a move valuable technique. Now in stead of fielding a unit of 3 or more Piranhas you can take them singly. As Wave Serpents and Falcons only have one access point (the rear), you only need one Piranha to block the exit. At the minimum an elder wave serpent with no upgrades with 10 guardians in the back cost well over 180 points, but more likely will cost closer to 300 points with specialized CC troops inside. That is an extremely juicy target and worth risking the points of one Piranha.
Now there are two ways to employ this tactic:
1. This tactic can be accomplished with a fusion or burst cannon configuration. Move the piranha 24 or less inches to behind the Eldar vehicle and use railguns, missile pods, or ion cannons to glance the front with as many as possible. Being as the front armor is 12 and our railguns strength is reduced to 8, I would not suggest using it first. Hope for a 6 on the glancing table and destroy both the vehicle and the troops inside.
2. Option two has your Fusion Piranha moving less then 12 inch and now able to fire his weapon. Rear armor is vulnerable to being melted thus 2D6 on armor penetration. It will still be a glancing hit, but now the whole army doesn't have to be involved in the tactic, and if he fails to bring it down you still have to option of using other weapons form your army to fire at the transport.
Now even if you don't succeed in your tactic you still have created a new challenge for the Eldar player. He will not be able to get away from the Piranha unless the tuboboosts, but then he cannot shoot or deploy troops. Second he will deploy his troop in an area not intended, but just to get them out of the transport. And now his main target priority will be the piranha that is exposed, thus shifting focus away from the rest of your army.
This tactic is also more likely to succeed if the vehicle was unable to move the previous turn from shooting thus allowing you to penetrate with most of our vehicle weapons.
"If you are screaming we are coming"1-169th Medevac