Top Heroes: where the EXP goes, and how much of a hero stars are
Reaching Lv.200 costs 1.6% of the EXP to the Lv.399 cap. At the cap, stars supply 42% of a Mythic hero's HP.
Levelling a Top Heroes hero from Lv.1 to the Lv.399 cap takes 1,347,010,045 hero EXP. The first half of the levels, to Lv.200, costs 22,192,945: 1.6% of it. The last 199 levels cost the other 98%.
Where the EXP goes
The first level costs 5 EXP; the last one before the cap costs 15,700,000. The curve is so steep that half of all the EXP to the cap is spent on the last 51 levels, from Lv.348 on.
A hero at Lv.200 is halfway up the level ladder but has spent only 1.6% of the EXP it takes to finish.
How much of a hero is its stars
A hero's HP and ATK are two parts added together: a level part that grows along the hero's level line, and a flat bonus for each star, from 0★ to 15★. At the level cap and the top star, this is the share of each stat that the stars supply, by rarity:
| Rarity | Heroes | Share of max HP from stars | Share of max ATK from stars |
|---|---|---|---|
| Rare | 6 | 30% | 10% |
| Epic | 8 | 30% | 10% |
| Legendary | 24 | 30% | 10% |
| Mythic | 16 | 42% | 16% |
Stars matter far more for HP than for ATK at every rarity. For a Mythic hero they are 42% of maxed HP but 16% of maxed ATK; every rarity below Mythic shares one split, 30% and 10%. Mythic heroes lean on their stars the most, so an unstarred Mythic gives up more of its ceiling than any other hero does.
What follows for planning
Levels are cheap early and brutal late
Pushing a wide roster to Lv.200 costs little. Past that, each hero is a serious EXP commitment, and past Lv.348 every hero takes about as much EXP again as all the levels before it put together.
Stars are the durability lever
Because stars carry so much of a hero's HP, starring up a front-line hero adds survivability that levels alone cannot. For damage, levels do most of the work: the star bonus to ATK is the smaller share at every rarity.
Check a specific hero
Any hero's exact ATK and HP at any level and any star is in the Stat Calculator, and the EXP for every level is on the Level Costs page. Gear, talents, skins and relics all add on top of these figures.