Xenia, a mainstay on any team and a F2P players best girlfriend. She is extremely good. One of the first units one should farm when starting the game.
what makes her so valuable? She can strip not just one buff but two! She can heal and she provides cool down reduction. Both her heal and cooldown reduction affects units twice. Once when the circle expands and another time when it contracts.
Xenia should always be built in adept and with tanks stats. You want her to live to be able to heal and strip. The cooldown reduction is extremely valuable and makes the team better overall.
Xenia is a staple unit and worth the time that it takes to farm her pieces. It can be frustrating but she is worth the investment.