PRO mode: level him up to where he has highest attack and lowest go if all units you are using. You may need to use some area attacking units. As your opponents threat and weak units kill him over and over again your area attackers will whittle down opponent. Playing him first has advantage to discourage wrath and path but may give away your strategy as people catch on. Pay players will have trouble using this strategy as many of their units will have too high attacks for this to work or low hp creators.
Quick mode: try him with five spell cards such as blizzard acid rain and best of all energy twister which is only purple card. Solo skeleton with right card will wipe out best of decks out there.
Hardcore: may be a good starting deck that can hang with any pro deck or at least knock it down to nothing for your second deck to come in and clean up. However this deck is likely not ideal for hardcore since skeletons archers ability is so short lived.
General tips: only one skeleton archer is needed. Since he is silver leveling him up is cheap but make sure his hp stays below other units you want to use with him. Lastly don't use this against me.... Or I vill break you
