Burning Heart is a primary Perk in Deadzone: Rogue, related to the Fire element. Its secondary perks are Inferno, Kindling, Searing Exposure, and Wildfire.
Perk Tree
Burning Heart
Burning Heart increases the player's Fire damage by 30% and causes Fire damage to apply Burn.
Inferno
Inferno increases the player's Fire damage by 10%. When the player kills a Burning enemy, they gain a further 20% damage bonus for 5 seconds. This effect doesn't stack[verification needed].
Kindling
Kindling increases the player's Fire damage by 15%. Additionally, the player's Ignite and Combustion Affixes gain a bonus to their proc chances equal to 10% of their base value[verification needed].
Searing Exposure
Searing Exposure increases the player's Fire damage by 15%. Additionally, the player deals 25% bonus weakpoint damage to Burning enemies.
Wildfire
Wildfire increases the player's Fire damage by 20%. Additionally, it causes Burning enemies to deal 50% of their Burn damage to enemies within 3 metres of them.
Strategy
Burning Heart is a dubious perk. Fire is generally the weakest Element of the four on higher difficulties, as Burn deals little damage over a long period of time compared to the player's weapons. It lacks the control capabilities of Cryo and Void, as well as the raw damage output of Electric.
Inferno is a poor perk compared to secondary perks of other perk trees. Its damage bonus requires killing enemies after first Burning them, while other secondary perks may get similar levels of damage for little cost, or sacrifice damage for significant utility.
Kindling is a mediocre perk. Neither Fire Affix is noteworthy enough to benefit from the increased proc chance.
Searing Exposure is a useful perk. Provided the player is able to reliably get weakpoint shots, the damage bonus granted by Searing Exposure is significant.
Wildfire is a poor perk. Burn doesn't deal enough damage for it to be useful.