==Elemental summons==
I agree with Elemental Dark summons.
Rigard is an incredibly good healer ( 42% all allies ), the only 4* with cleanse ( remove status ailments ).
Sabina is useful against all but purple, very good heal ( 42% heal all allies ), with a very high attack stat for matching/ board/ physical damage, and remove enemy buffs. She is a green clone of 4* Melendor.
Tiburtus is useful against all but purple, has one of the best 4* abilities in the game ( ramming pulverizer ).
==Generic team advice==
Some heroes are good, some suck, but most are okay.
I recommend all players build up a rainbow team of 3 star, tier 3, level 50 heroes ( 3* 3.50 ) and a rainbow team of 4 star tier 3 level 60 heroes ( 4* 3.60 ).
Rainbow teams are the most versatile in the game.
Rainbow 3* team can be gotten fairly easily in the game.
Training camp level 20 lets you get a 4* hero every 10 days.
4* 3.60 heroes are the most powerful heroes using only farmable ascension materials.
Some heroes are good, some suck, but most are okay.
Since your rainbow 3* 3.50 team and rainbow 4* 3.60 only used farmable ascension materials, you can save your 3*/ 4* non-farmable ascesion materials for good 4*/ 5* heroes.
Even if your first two teams suck, Grave damage ( see notes ) is using a weaker 3* hero to boost the damage of your 4* team to help you get 3* ascension items during Rare quests.
You can level TWO rainbow teams of 4* 3.60 heroes for the same XP as one rainbow team of 4* 4.70.
==Notes==