Useful Tips

Top Hints

 * Give priority to Item that boost Attack (rather than Health, Crit %, Dodge, etc)
 * Have a Knight as tank, is useful to have a priest too
 * When fighting one element you can also put a servant that counter that element as tank (ex.: put Ice element servant on the front against fire enemies)
 * Make friends, join guilds, do Infinity Tower, Challenge Mode, World Boss, Guild Raid, etc
 * Trade Rubies for Keys, and try to advance story mode as fast as you can. (you will get a lot of bonus characters by completing the chapters)
 * Avoid to sell everything servant/item that is not useful, use them to upgrade and enhance.
 * On tough levels, you need to manual fight, wait for each attack get fully charged before going to final boss of the level. - Try to kill the bosses in single turn!
 * Always enhance new servants for the first time, you get free rubies for each maxed servant (for first time), there is also an achievement that gives bonus for maxed
 * Keep in mind the achievements bonus, specially for maxing servants, upgrading servants and items, evolving servants and items.
 * Try no not dismiss/sacrifice servants of 4 stars and above, specially on early/middle games. You may need them later!

Classes
World Boss, Guild Raid, Bosses - Use preferentially 1 Knight, 3 Fighters, 1 Priest. On on most of cases: Fighters do a lot more damage than other classes on single unit. Look at the placement of boss's special attacks, and place your party accordingly.
 * Knight = Tank, (2x Health, Defense boost skills)
 * Fighter = Damage dealer on front/single enemies (High Critical rates, Great offensive skills)
 * Ranger = Damage dealer on custom target (High Critical rates, good in manual combat mode)
 * Mage = Damage on group of enemies (High Critical rates, good against a lot of enemies)
 * Priest = Healing and Blessing (attack boost, etc)