thankfully i do have both cyclops and kingu both are powerfull, cyclops for her attack debuff/cleanse and kingu against single target high damage attacks rest of my main team basicly is awakened thor and tyr, nemesis and astrea since her resist debuff really reallly REALLY helps alot :P
but yeah this sr thunder healer is def a nice addition since not many of us are lucky enough with gacha for limited edition himes like that ssr thunder healer ryo-oh (though i do have water osiris and wind apep)
and to magicspice regarding tower
i was lucky enough to clear up untill floor 12 as a f2p since i has 6 water SSR no rudra though, but with 4 large assault weapons 2 at skill lvl 20 and 2 at lvl 15 and herc soul weapon i did make it far (though on typhon only herc was left :P but still won)