Luck AchievementAdditional Challenges
These are a set of extra Luck Challenges meant to provide people with some interesting side quests to attempt on SM ladder. All of these only count if the opponent you win against has 1500 ELO or above. Note that these are seperate from the main body of Luck Challenges and are not needed to get the Custom Avatar.
No, you must do the first 4 Luck challenges for CA(Surgical Strike, The Sweepage Special, Not So Weak an Taken by Storm). The Additional Challenges are completely irrelevant for CA.Luck Achievement
"Platinum: 4 Luck Challenges complete."
These 4 Luck Challenges can be Additional Challenges quests or you must do Surgical Strike, The Sweepage Special, Not So Weak and Taken By Storm for the custom avatar, with the Additional Challenges being completely irrelevant for CA, only for those who want to challenge themselves and want a kind of bonus, is that it?