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'You', not 'u', and your post is a block of text - use paragraphs and don't end every sentence with '...', and it's a lot more readable.
Kill Tidewalker first. He's easy if u have competent healers and an AOE strat... Once hes dead it will despawn alot of really easy trash for followup raids for an easy second kill on fathom lord. Lurkers easy but frustrating when you only have 3 people fishing (no, im not joking). If you can fish him up quick thats another good option, that was our first kill, but its one of those fights where u have to find the strat that works for you... unless you clear the steam pumps... then you can just copy DnT i suppose. Fish make it alot harder, but if you base your strategy knowing that fish are in there, you can still come up with a repeatable kill without clearing extra trash...