Fix the damn heroic strikes bug!!!!!; I've done 35 with no progression towards sleeper; covered all parameters of cause (launching in orbit, blah blah blah) I've supported Destiny through everything; but this is the breaking point I actually feel disappointed in myself for expecting them to turn this game around.
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Are you using boons during strikes? Not sure it is related to your specific problem, but I know using boons often results in not getting credit toward the strikes milestone.