Original: Keep your post short (no more than 250-500 words), well-diffed (multiple diffs showing evidence), and focus on user conduct issues (the tendentious editor is not engaging in discussion / is inserting unsourced information / is ignoring talkpage consensus).
Simplified: Keep your post short (no more than 250-500 words), well-diffed (multiple diffs showing evidence), and focus on user conduct issues (the tendentious editor is not engaging in discussion  / is inserting unsourced information  / is ignoring talkpage consensus).