0 specagent Members 1 post Report post #1 Posted July 12, 2015 Hello, I am trying to figure out what skills to pick for my cruisers and battleships, and I would like to know how exactly the percentages of the fire-prevention skills and upgrades are calculated. Damage Control System Mod. 1: -5% chance of fire Fire Prevention: -7% chance of fire Demolition Expert: +3% chance to set target on fire Are these values absolute or relative? Absolute would mean that somebody with the Fire Prevention skill could never be set on fire by <= tier 6 destroyers and cruisers whose HE shells have <= 7% probability of setting targets on fire. The damage control upgrade would lower this chance even further, and would mean that an early BB with a 20% fire probability for its HE shells would only have an 8% chance to set you on fire. The Demolition Expert upgrade would then mean that a cruiser with 152mm shells and a 7% stock fire chance for HE would have a 10% fire chance with the skill, effectively resulting in an almost 50% higher chance of setting its target on fire. Or are these values all relative to the base fire probability? In this case, the skill would be nearly useless. Share this post Link to post Share on other sites
65 Nuisance_Value Beta Testers 264 posts 1,473 battles Report post #2 Posted July 12, 2015 It's relative to base for prevention but added to base for demolition. Share this post Link to post Share on other sites
478 Final_Spark Beta Testers 2,440 posts 8,653 battles Report post #3 Posted July 12, 2015 (edited) Demolition Expert is additive. It works as you think, it just tacks on +3% fire chance to each shell. Both of the fire prevention methods work differently. There is a hidden fire prevention stat for each ship. The upgrade and skill are their listed percentage of that stat. The example given was a tier 10 ship having a fire prevention stat of 0.5. Taking the Fire Prevention skill, you would subtract 7% of 0.5 to the hidden stat, so you'll end up with a 0.465 multiplier. This final stat is multiplied with the shell fire chance to obtain the "real" fire chance per shell. So take a Cleveland's 12% fire chance per shell: 12*0.465=5.58% chance of fire per shell. With Demolition Expert it will be 15*.465=6.975% chance. With all bonuses in play it will be 0.44*15=6.6% chance. It's a safe bet to assume that lower tiers have worse native fire prevention stats. The issue is that the fire prevention addons have a very small effect when compared with Demolition Expert. Edited July 12, 2015 by Final_Spark 1 Share this post Link to post Share on other sites
