Here are some TIPS & TRICKS for Elune Saga that might help you people.
Soul Upgrading
Soul Upgrading is the basic need of any Souls to get a powerup this is done by accessing the UPGRADE interface in the SOULS building and putting or dragging the card you want to upgrade to gain a level.
It is best to use level 4-5 cards to upgrade your card so that the gold used is maximized.
When using upgrade cards its best to forge them to a higher star so it gives more exp per card and you wont spend 30k gold in using 10 2* upgrade cards where you can use 300 gold and use a 5* card when upgrading. So always forge your upgrade cards.
Soul Enhance
Soul Enhance gives 5% increase in HP and ATK of a card per enhance so always enhance the card you have equipped on your character.
Max enhance is capped at 50% chance of success even with 6* enhance card and gives a +5% chance when it fails.
Soul Awaken
Some Souls have the ability to awaken from 2* to a higher * by maxing the upgrade and enhance you can awaken the card and it would increase in star level and it skill would upgrade too. But be warned after awakening the soul would revert back to level 1 and lose all enhancement on it.
Daily Blessing
Always be aware of the daily blessing so you can maximize your hunting or upgrading of your souls.
GOLD FARMING
Gold farming is best done by completing all the trophies of each map. If you have maxed all the maps that you can the next best thing is to sell 1*-3* cards that drop from trials.
Level Farming
Best way to Level farm is when you get the Character Blessing which gives +1.5exp in trials. if your just starting new best combo this when your clearing the Trophies of maps gives a large boost in exp.
Another way is farming in Dungeon it gives a better exp boost in lowlevel and only has 1 wave and you can add 1 friend to your party which gives some hearts.
General Tips
Save up your Gems/Crystal use it to summon souls rather than buy costume cause if you check the stats of the last costume in each character it amounts to 1 4* soul in maxed with benefits of skills. Better buy costumes using gold.
If your aiming for the gem bought characters prepare 300 gem to get the char and its last costume.
Consecutive gem summoning is better than summoning every 30 gem you got cause the next summon would only cost 27 gem.
Expanding maximum Soul only costs GOLD expand till 100/100 after that it costs gem.
Friends list needs 3 gem per expand
The achievement for 50 friends is you can kick a friend and invite another to get the total of 50 you dont need to have 50/50 on your list.
The last Boss in every MAP has a chance to drop 3* card try farming them.
Only the top 3 cards skill in your character are usable in battle the bottom 3 are just for stats.
Dungeon Keys can be bought for gold if you already used the free 6 keys.
Credits: Special thanks to CrazyAple for making this simple but straightforward Elune Saga guide.