So, with -straps 2 on my 1080ti, I get around 48 mh/s on the MINER, but the reported hashrate on the pool (2miners) is only 35 mh/s
On average hashrate on the pool, 35mh/s too
So it does not work well ?
Look at your miner statistics. How much rejected shares? How much incorrect shares - it's hardware erros.