If they all were leveled I would choose in this order from left to right- Melendor, Li Xiu, Jabbar, Kiril, Scarlett. Jabbar should not be underestimated as a center tank, very high defenses while putting out significant damage.
But judging by the levels of your heroes, it looks like they will also be used on attack and generally everything that you do. I would focus on leveling up a well rounded team, not just defense oriented.
The team I would level first for general play- Gafar, Melandor, Gormek, Kiril, Jackal.
Jackal & Gafar gives you fast damage, an important attribute of defense and attack teams to “snipe” out key targets.
Kiril- well rounded healer with attack+def buff. Very useful to counter enemy specials, including Titans.
Gormekk- an armor reducer, this is key to big damage on Titans and sets up your attacks to kill.
Mel- buff removal and healing. Helps against riposte and buffing heroes.
This will give you a good base that can be effective in raid attacks, defense and Titans.
I’d run this team defensively in the order of Gafar, Mel, Gormek, Kiril, Jackal.
Hopefully this gives you some good direction. Best of luck!
Syndicate of War