Havoc Skytank The Havoc Skytank is a boss in " Final Fantasy XIII " fought at the end of Chapter 7 outside Hope Estheim ' s home . Battle . Lightning , Hope , and Fang participate in this battle . In the first part of the battle , the Skytank uses its Hulls and Turrets to inflict severe physical damage to the party . Havoc Skytank is a long range target and thus Lightning will only use her gunblade in the gun - mode when selecting the Attack command , and Fang , who wields a melee weapon , cannot use the Attack command at all , forced to resort to Ruin spells . When low on HP , the Skytank will start to use its Main Cannon attack , which inflicts a large amount of damage to all party members , but is now vulnerable to stagger , with a stagger point of 200 % . The use of Main Cannon can be avoided by holding off on destroying one of the turrets or hulls until the Skytank is below about 80 , 000 HP , at which point destroying the remaining hull or turret will defeat it . Strategy . A good strategy is to start with Lightning as a Medic , Hope as a Synergist and Fang as a Sentinel ( or Commando ) . The party should be prepared to shift to two Medics and a Sentinel if too much damage is sustained . Once all characters are under Protect , the party can shift to a more offensive paradigm and begin assault on the Hulls and Turrets one at a time . As none of the targets can be staggered yet , it is best to use a Commando , Ravager , and Medic combination . Defeating the support targets not only lowers the Skytank ' s damage potential , but also takes a large chunk out of the main target ' s large HP . Once all support targets are defeated , the party can focus on the Skytank itself . If Lightning uses the Commando paradigm and selects Attack , she will rapidly shoot out a flurry of bullets . This could be a helpful option when choosing a Commando , as Fang can not use the " Attack " option , but only Ruin . Because Fang has a low magic stat , it could be more effective to use Lightning as a Commando , although Fang cannot heal . The paradigms COM / RAV / COM , or COM / RAV / SEN , can work well . When Havoc Skytank becomes vulnerable to stagger at low HP , the party can shift to a Commando and two Ravagers and aim to stagger it and heal with a Medic when necessary . No Crystaria Strategy . If a player attempts this fight having used no Crystogen Points at all , the player should have a Tungsten Bangle equipped on both Lightning and Hope , given their low HP , and a Black Belt / Tungsten Bangle on Fang , so she has a higher resistance to attacks . The player should keep quite a few Potions in stock . The use of a Fortisol and an Aegisol makes the battle easier , but the battle can be done without them . The recommended paradigms for this battle are : The player should start off with Protection and let Hope bestow Protect on everyone if an Aegisol wasn ' t used . Thereafter , the player should switch to Solidarity and blast the turrets with Attack or Ruin , whichever of Lightning ' s STR / MAG stats are higher . Entourage would also be a good match with Solidarity , boosting the chain gauge while still obtaining defensive properties . Once either of the units are staggered , the party should switch back to Solidarity . Once the weakened Havoc Skytank is all that is left , Relentless Assault or Diversity are good paradigms , but if one wants to play it safe the Solidarity / Entourage rotation can be kept . The chain gauge should be boosted all the way to a stagger , which can be done once the Skytank has approximately 75 , 000 HP left . Once staggered , the player should change to Tireless Charge . If a party member is brought down to about 50 % or critical health , the party should shift to Solidarity to heal up or use a few Potions . Other appearances . " Final Fantasy Record Keeper " . Havoc Skytank appears as a boss in Palumpolum , Part 2 and select " Final Fantasy XIII " events . The Skytank is an aerial target , so melee attacks will miss . The player will need distance weapons and magic in order to take it on . Targeting the four support arms is the quickest way to defeat this boss , as each support arm will damage the body once downed . The Target Score associated with this enemy requires for all participating characters to not die during the battle against it .