Best scalping strategy always rely on your trading style and your requirement, but make sure to look into broker that offer good amount of spreads and lower commission
Scalping, when used in reference to trading in securities, commodities and foreign exchange, may refer to a legitimate method of arbitrage of small price gaps created by the bid–ask spread.
Low spreads, decent leverage and low commission charges are some factors you should take into consideration if you are a scalper. Rest depends on what you are looking for. I am also into scalping and have been using turnkey forex for this. Everything good so far. You can check if they match your requirements too.