THE Tricks

Short version:
Levels below 19: - no Melee
Levels 20 - 29: + Mounted Only
Levels 30 - 40: + Only Flying and Mercenaries
Levels above 40: + Only Flying & Epic Hunters (Mercenaries)

Long version:
Levels 09: Tier1 = + all Monsters, all Mercenaries, - No Melee
Levels 14: Tier2 = + all Monsters, all Mercenaries, - No melee
Levels 19: Tier3 = + all Monsters, all Mercenaries, - No melee
Levels 24: Tier4 = + Mounted, Flying, - no Dragons
Levels 29: Tier5 = + Mounted, Flying, - no Dragons
Levels 34: Tier6 = + Melee, Flying, - no Elementals
Levels 39: Tier7 = + Flying, - no Elementals
Levels 44: Tier8 = + Flying, - no Elementals

Easy way attack to CITADELS
Note: Have the catapult amount for each upper tier, or double the amount for lower tier.
(ex: if 160 of Tier2 catapults, 80 Tier3 catapults should do it)

Elven Lv10: + 100 tier2 Catapults, + only Ranged troops (+ griffins if you can)
Elven Lv15: + 320 tier3 Catapults, + only Mounted troops (+ griffins if you can)
Elven Lv20: + 800 tier4 Catapults, + only Melee troops (+ griffins if you can)
Elven Lv25: + 3200 tier5 Catapults, + only Melee troops (+ griffins)
Elven Lv30: + 1050 Catapults level 7, + Flying: Corax, Griffins, Royal Lions, Vultures etc
Cursed Lv20: + 2200 tier4 Catapults, + only Melee troops (+ griffins if you can)

Blue Prints Chart: Calculated for 1 of each necessary building: Capitol, Barracks, Academy, Farm house, Mansion, Temple, Forge, Caravan, Tar workshop, Portal Master and Consulate.
Buildings Lvl 10 (Tier 2) = 320 blue prints = 3,200 gold
Buildings Lvl 15 (Tier 3) = 2,450 blue prints = 24,500 gold
Buildings Lvl 20 (Tier 4) = 10,400 blue prints = 104,000 gold
Buildings Lvl 25 (Tier 5) = 25,600 blue prints = 256,000 gold
Buildings Lvl 30 (Tier 6) = 51,000 blue prints = 510,000 gold
Buildings Lvl 35 (Tier 7) = 112,000 blue prints = 1,120,000 gold
Buildings Lvl 40 (Tier 8) = 196,000 blue prints = 1,960,000 gold
Buildings Lvl 45 (Tier 9) = 343,000 blue prints = 3,430,000 gold

Easy way to get more rewards in Ragnarök shop:
1. Start training your next tier of guards (choose one) but do not complete it. get the helps.
2. When Ragnarök starts, do not enter any of the Ragnarök events. search the map for the wolf and snake and attack each one.
3. Complete the research for your next tier of guardsmen/ troops.
Congratulations, you have reached the next level!
4. Now open the Ragnarök event tab only not the shop.
5. Go and hit the wolf and snake once more.
6. Now return to the Ragnarök event and open the shop. you will get the rewards of the following level with the points of the lower level.