Hi Bempoo. Yes Loki is really tricky but if you use Captain America I found strategy that works. Use your shield throw to attack from long range and you can jump down from the platform to lure him down stairs. You have to keep dodging his guards going up and down the platform but eventually you should be able to ware him down as long as you don't get trapped in one of the little corridors below the ledge. I know what you mean. It was quite frustrating even with co-op mode 3 of us were playing and we kept dying. I was the only one left from my team so luckily I used this strategy and beat the level. Let me know if you still have trouble and I can help you further.