None of the above.
Technically double color, missing color.
==Yellow dilemma ==
For raid I am currently doing double blue no yellow team because Wu Kong does not do direct damage and Jackal really works best with double yellow. If I get Gretel I might go rainbow 4* for raids.
==Hansel & Perseus, together they fight crime ==
Instead I use Hansel for fast mana speed special skill control and special skill defense buff, Perseus for fast non-dispellable -100% Healing for 4 turns, Grimm for Ramming Pulverizer, Scarlett for fast Splash damage and 6 turn enemy attack debuff and Rigard because why would you not bring 42% heal and cleanse on a 4* 3.60/ 4.70 team ?
This team can get into Platinum raid arena whenever I feel like rising out of Gold.
==War, what is it good for?==
For War I create a rainbow team of my best still available healers, then compare them to the war defense team and pick 1-2 of my best options removing the other 3-4 healers. Once I have healer/ healers selected, I select from available heroes ( and special skills ) to counter the enemy with preference to strong color against Center and flanks but picking neutral colors against Center and flanks if special skill better against the enemy. This method often results in double strong double neutral, double strong double strong, or double neutral double neutral versus the Center and flanks.
==Gryphonkit 4-1 Diamond ==
Gryphonkit, my wife, is in mid Diamond Raid arena with Hansel 4* 4.70, Obakan 5* 4.80 and three 4* purples for her attack team. She loves Guinevere Centers, but can take out most defense teams with one or two tries. She made Top 200 Global and fought current #4 Global once ( this is all relayed from her relaxing in her recliner).