I’ll give everyone here the secret to doing end game content here ( mostly 5 man and pvp )
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Make friends with similar interests ( in OPs case, people interested in doing keys )
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do the key, if time do highier key till you reach next step
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fail the key
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talk about what went wrong and why
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figure out how to prevent or fix w/e went wrong ( missed intrupt? Assign a kick to important cast on that specific pack )
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do key again, if time then repeats step 2 and onward
TLDR, just play with friends with similar interests and have good attitude and have fun