How to effectively use Medusa?

I have her as 4/40 4* and dont know how to use her. My ally mates tell me she is trash and to sell her which ive been thinking of doing but is she a good champ and was it a good idea ranking her?
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Dont listen to your alliance they jealous that u have medusa lol
Blast opponents with MLLLM attacks when you have 1 bar of bar chain MLM + sp1. Shatter their armor. Build up sp2 and hit them with it. Rinse and repeat.
Unless you’re facing the ultron boss in 5.4 lol
MLLLM combos then M-SP1 to get the 6 armor breaks to cause shatter. Once there, build up to SP3 (plenty of time to do it) then it will re-shatter the armor.
Completely shuts down armor buffs on any champ and will also shut down power gain on robots (vision, Ultron, sentinels, etc). A definite go to for AQ now.
1. armor shatter, s2, repeat-for "short fights", the s2 is game over for most fights
2. build up permanent armor breaks(2-4), get the armor shatter with short combos, and only use s3 after that. Watch the permanent bleed and your sick crits take the opponent down! -for long LOL like fights or to destroy robots
1. Build to an sp1, do a mlllm combo+sp1 (this adds up to 6 armor breaks, which will convert to a.s.)
2. Build to sp2, use the sp2, then do mmmmmm combo (once again, places 6 consecutive armor breaks)
3. Use sp3, which will place armor shattered automatically.
Once you have armor shattered on, critical light hits will place a permanent bleed. You will want to either maintain armor shattered thru the sp3 (a.s. can stack btw), or use the sp2 for even more bleeds