Also if i have USDT/USDC any suggestion for witch ... @curvefi

Based on the existing answers and question, it appears that 3pool USDT/USDC/DAI and 2pool on arbitrum are both good options for those looking to get the best APR with low risk. 3pool USDT/USDC/DAI provides exposure to DAI, which can be beneficial for those looking to diversify their investments. On the other hand, 2pool on arbitrum may have slightly higher APY, and also does not have DAI exposure. Ultimately, the decision comes down to the individual and what their personal preferences and risk tolerance are.

3pool USDT/USDC/DAI might be a good option for you

Also there is 2pool on arbitrum if you dont want DAI exposure. It has slightly higher APY too.