Foreign Equities for ROTH IRA

I want to hold foreign stocks in my Roth IRA, what do you think of the conclusion I’ve made:

KSA (Saudi ETF) 5%, INDA (India ETF) 55%, EZA (South Africa ETF) 15%, BABA 25%

Please suggest what would be a better alternative to this? I am high on Indias growth, should I just buy a larger share of that (20% of ROTH)? Is 20% of Roth in foreign investments too risky (over 40 years till retirement)?