Credit: Murdoink @ Mortal Kombat Warehouse for all background, logo art and character renders/


MK11 Sindel

Despite the terrible characterization of this version of Sindel, the Mobile version is an absolute unstoppable force. She has an excellent kit that takes advantage of highly aggressive status effects. Add in that she can apply Shield Break to the entire team, and she's an absolute must-have addition to any MK11, Outworld or Netherrealm team.

Edenian Blood Kitana

It's another version of Kitana on the roster, but she's not terrible. She has good effects and potential for high damage with her passive, though it does require maintaining blocking. Her potential for damage is her ace in the hole, so work toward keeping it available and ready if it's not already active. She's an effective addition to the Edenian Blood team and as a Gold version of Kitana that isn't Mournful.
Sub-Zero (Prime)

The prime version of Sub-Zero isn't the best Silver card, but he's useful. He's a decent Silver card to use until you have Kenshi, mostly because of his passive. Keep him surrounded by Martial Artist teammates to maximize efficiency.
Tier Rankings
Lower tier

Tier 1:
Garbage tier. This tier is for cards that don't do a lot of damage or contribute with their passives, even with add-ons from Shao Kahn's Tower or gear. Use these only if you absolutely are required. These mostly consist of the bronze and silver characters, except for Kenshi Prime.

Tier 2: Slight useful. Their passives either contribute or a special move is useful in service of another card. They can be made to be somewhat useful with gear and add-ons and higher fusions, but they struggle to be useful even with the best gear.
Middle tier

Tier 3: A solid mid-level card. These cards are useful in passives and special moves. They can hold their own on point and win matches.

Tier 4: An above-average card. These are highly useful and can be used in any of the Challenge Towers (Shirai Ryu, Lin Kuei, etc.) and are more than capable of holding down a roster spot and surviving against high-level cards if they’re close in level. These cards have excellent special moves and do a lot of damage quickly.
Upper tier

Tier 5: The top echelon of cards. These cards are the best in the game, and their special moves and passives have game-breaking potential. They are the cards that you buy packs for and try to build up for Challenge Towers and will potentially make it to the 170 and higher levels of a tower at even a low fusion. They are mostly diamonds, but there are a few gold cards in the mix.