
Originally Posted by
pepeda
For now, best use of gems is Food, buy all food daily and when you get enough gems, pick a 10x gold chest once, then keep spending gems on stamina ever, till level 90, exp is the most important stat and you need to be as high as possible to have chances to be in top of arena.
At start, experience vials should be used on your heroes, keep them at your level and save the rest, keep saving big ones and spend small ones and never sell, having your arena team at your level and skilled will help a lot to get better rank in arena.
Raid tickets are used when you achieve 3* on a normal/Elite stage, you can use a ticket and do an instant quest, is almost the same as doing manually the quest, I usually do normal quests when have time and save tickets for the day I don't have enough time.
It depends on the hero, no hero is bad or useless (except PK), but there are heroes that are more useful than others and some heroes that are really good only at levels 1-50, others in the 50-70, others in the 70-80 and others only on 90 and legendary... You'll find a ton of posts here about what heroes are "best".
As a sample, from the 5 heroes that you start (Adm, LE, ES, Chapp, SL), only Chapplain and ShadowLeaves are great from level 1 to level 100. Keep these two skilled and leveled.
Admiral and Emberstar are great at level 90 and legendary, Admiral being one of the best tanks in game and ES being one of the best damage dealers, but till level 90, there are other heroes that performs much better, so keep them while don't have any better tank of damage dealer but if you have other heroes, replace them.
LE is good at start, but after purple he don't have many life and his damage isn't able to kill opponents as before. Replace as soon as possible.