No, it will stay at 400 until block 100,000 and then will begin halving every 50,000 blocks. We plan to switch to Proof of Stake after 6 months or so. The best time to mine this coin will be the next couple of months.
1 S1 already dedicated for the purpose, i dont know why my guts are telling me to do it

Thanks for mining. Sometimes it's good to trust your gut. And also to do your due diligence. In this case, I think the two will lead you to the same conclusion.