Hi Boyan,
As to which EA to use to pass the challenge depends upon the current market environment. You can go to your EAtradingacademy account and select the FTMO app tab and their you can see which EAs are performing the best in the current market environment.
As to Infinity Forex Funds I would not recommend using them as you may not get any payouts. I recently bought an Algo Evaluation from them when they were running a 50% discount. I forgot to add the discount code and was charged the full amount. They refused to offer me the 50% discount and would not refund the difference even though I had not yet started to trade the account. I am skeptical of them!
Alan,