User blog comment:Lioni/Avant / Sirius / Silas comparison/@comment-24570336-20160727165950

Could you explain on the less survivability option on Avant?

His LS gives 50% HP, his favorite sphere gives him 50% all stats, and his very high base Atk stat makes Atk>Def buff very effective. So what makes him less durable compared to Silas and Sirius?