I don't think he is a protector
I think he is more of a person who prolonges coming doom
DD are capable enough to protect themselves, but when Pi or someone attacks DD & they are unprepared or unaware of the coming doom, having Rakshit around gives them a bit more time to face the upcoming trouble
Like in last episode, first bcz of his dance & then as Pi said their chumma chatti, she was unable to trap D. & when Pi was dragging D by holding her hand, D was still not in her senses & vulnerable, Rakshit coming between Pi & D gave D chance to come in to her own senses
& as Pi often says only the whole Kaal Vijay Ratna can defeat her, so the reunion of the sisters
All of these became possible bcz Rakshit came in between.
I don't want him to suddenly develop a supernatural power, him being sensible enough & good thinker should be enough to help DD
But I think to defeat Pi it's important for the other two Ratna to have its owner & it would be cool if Rakshit possess the power of tatva ratna then
( I shared my thoughts about this on heir to 3 ratna post)
But coming to the topic, on one hand they say Kaal Vijay is the most powerful ratna & one possessing it would be undefeatable & if on the other hand they need protectors with supernatural powers, to be saved from Pi then it would be contradicting & everyone going on about how Kaal Vijay is the most powerful ratna will seem stupid & a lie