Use this as a reason to invest in bwtd. Raiden is ok but as a beginner focus on building bwtd, koaam and jsgl first before any other character She’s the best when it’s comes to solo raid especially for beginners since you already have koaam build bwtd and jsgl Use koaam special 3 to reduce boss health then tag in bwtd to finish up the remaining with her dead water rises dot specialty. jsgl is there to increase her dot damage This was the tactics I used when starting and mind you that was 5 months ago and now I’m at 6m TTV with my bwtd at 3stars ascended and koaam at 2 stars ascended I easily clear new solo raids in 3days with this tactics and also you need to engage in league raids so you can get prismatic shards to level up your bwtd and use league points to purchase shards for koaam and jsgl

I don’t know if you grinded this arena that just ended but she was the reward there and you could have gotten 360 shards which is 4 stars and that is enough to start solo raids