Hello tcdaund,
Positional trading is always better than intraday trading. I also have developed 2 intraday strategies and in backtesting found they are successful. But I discovered profit from positional trading is always more than intraday trading.
Regarding short position in mini nifty. I can't give you any suggesstion as I am technical trader I just follow the signal (Long/Short/Exit) given by mine trading model. As of now I have exited my long and I'll enter short in range 5325-5305 .
Happy Trading...