Destiny Child - Secret to Success in Rumble

Destiny Child - Secret to Success in Rumble (even with 25K power deficit)

I have felt so frustrated with many match-ups in Devil Rumble, that have always pit me against crazy tough opponents and with team power way,way more than me. But by now, I have a win rate of over 52% in Devil Rumble and have now achieve Silver rank 4 and going to reach Silver Rank 5 (now about 8110+ points).
The secret to success is 1. Item quality and upgrades, 2. Skill upgrade, 3. Types of combatant and closest weakness element and battle types.
1 and 2 are straightforward, but they play quite important roles, as majority of the battle is aided by this two factors. The only problem are these resource are limited, and there is not much to play around and it takes time to build up unless you spend a lot of money.

My current deck consist of 2 attackers (Mafdet, Liberated Maat), one support for skill speed (Chang'e), and one healer that also act as defence (Syrinx), and one support that act as defense and attack buff (Epona).
We can't overlook the importance of debuffer Rumble as the battle can't usually be concluded until Fever is available. Therefore, any slowness to activate skills or reduced Drive meter will result in a loss. Slowing skill debuffer like Cube Moa, Olga, Lan Fei, are extremely important, since they also most probably has decent DPS with their double attack together with their skill speed reduction debuff.
To achieve this end, I'm training Lan Fei (for Drive meter reduction), Olga (for Silencing enemy), and Yaga (for slowing down enemy Skill meter), and will probably change Yaga to Naias (for support speed) when I get her in the future.

Sorry that I'm out of touch with the blog now, as I just play the game without bothering to report much.