While these are rarely enough to justify purchasing one, this should be considered when deciding which teammate should pick up a captured Rapier.
List of heroes whose purchase of Rapier could be justified due to their AoE damage:
美杜莎 can attack up to five targets with each attack, her ultimate increases damage dealt if the enemy tries to keep fighting her, and her 魔法护盾 offers an immense amount of damage reduction. Even then, she does need a large pool of bonus stats from her items to be properly durable; the enemy could choose to kite her in team-fights to avoid damage output, or even split push to victory.
矮人直升机, like Medusa, can attack the entire enemy team at once with full damage by 高射火炮, and 阿哈利姆神杖 allows him to attack nearby enemies even when disabled, giving a massive increase in damage output. However, Gyrocopter is extremely vulnerable to disables without 黑皇杖, and without 撒旦之邪力 he has no way to refill his HP mid fight.
露娜 has the potential to destroy multiple objectives during a push, as well as improve her late-game team fighting potential thanks to 月刃 and high agility gain. Yet Luna requires multiple survivability and damaging items to be an effective carrier, and her lack of attack range could be somewhat problematic for damage output.
灰烬之灵 can deal extreme damage to the enemy team when using his low cooldown 无影拳 combining with 狂战斧 and 代达罗斯之殇. He is also elusive with proper use of 残焰. On the other hand, Ember Spirit has deficient HP and armor with the Rapier build and should prevent from getting caught in split push or team fight.
昆卡 can do extreme damage to the entire enemy team when he combines Divine Rapier and 代达罗斯之殇 with his 潮汐使者. He can keep himself alive by self-casting X标记 in a safe place, running in to attack before returning to safety by activating X标记 again.
齐天大圣 can deal extremely high amounts of damage to, and potentially kill the entire enemy team from a safe distance when he combines Divine Rapier with the innate critical strike of his 棒击大地. Additionally, Divine Rapier's damage can be copied by 猴子猴孙clones and fully works for them.
圣堂刺客 can spill Divine Rapier's damage across multiple enemies with 灵能之刃 and protect herself from burst damage with 折光, while strategic use of 隐匿 and 灵能陷阱 allows her to shake off pursuers and take down enemies more effectively. However, Templar Assassin suffers from short attack range, requires strong positioning to use Psi Blades effectively, and is relatively fragile without Refraction.
List of heroes whose purchase of Rapier could be justified due to their effective damage output and pick off potential:
风行者 with some form of initiation and 阿哈利姆神杖 can pick off anyone bonded by a 3.5 second 束缚击 by a Divine Rapier boosted 集中火力. Her 风行 can protect her by some extent, but when get caught out of position Windranger is still fairly vulnerable.
狙击手 excels at dealing damage from a safe distance. Under his teammates' protection, Sniper can output massive damage from behind when holding Divine Rapier. Yet Sniper is fairly fragile, and one single negligence could feed the Rapier to the enemy. A special mention goes to 阿哈利姆神杖: as his upgraded ultimate deals damage based on his attack damage, Divine Rapier is the best item to increase 暗杀's damage output.
克林克兹 receives a massive damage increase from Divine Rapier due to his high attack speed. With some form of lock down, he can hunt down lone foes with 邪恶镰刀 and 血棘. However, Clinkz is nowhere durable even with the health boost from 死亡契约, as messing up with the cooldown of 骨隐步 he could be caught easily.
幻影刺客 can output an absurd amount of single-target damage thanks to her 恩赐解脱. Together with lock down items such as 深渊之刃 she can kill most heroes if her passive procs. Rapier also adds extreme damage to her 窒碍短匕. Beware that she is still vulnerable to lock down and magic burst damage, as well as 金箍棒.
编织者 is a valid carrier of Rapier due to his extreme elusiveness from 缩地 and 时光倒流. Though he is still fragile, he can tear up support in two hits from 连击 and kite the enemy carry with ease.
主宰 can attack with potential critical strikes while invulnerable during his ultimate and has a built-in spell immunity spell he can use to escape afterward. Divine Rapier should be purchased when Juggernaut found himself deficient in damage.
虚空假面 can kill foes locked in 时间结界 in seconds with Rapier. 时间漫游 makes him hard to be chased and escape from.
德鲁伊 could exploit his bear to split push with 阿哈利姆神杖. With Demolish his bear could take down objectives in seconds with Divine Rapier.
赏金猎人 has a guaranteed 225% crit every 6 seconds (every 1 second with Level 25 left talent) by 忍术. He can sneak up to lone foes and kill them with surprise with Divine Rapier using 暗影步.
巨牙海民 has a 350% crit (500% with Level 25 left talent) by 海象神拳！, which is massively boosted by Divine Rapier.
List of heroes whose purchase of Rapier could be justified due to their innate tankiness and strong combat capability:
冥魂大帝 has essentially two lives to spare with 绝冥再生. Though Rapier doesn't prevent Wraith King from being kited, he has 本命一击 to boost his damage and Lua错误 模块:Ability_ID的第61行：无法找到"吸血光环"的Cargo数据 to keep up, making him a formidable foe in close combat. 冥火爆击 serves as a reliable stun, together with some form of initiation Wraith King could kill an enemy within seconds. A special mention goes to his 阿哈利姆神杖: combined with 黑皇杖 he can teleport to base in Wraith form with a minimal possibility to feed his Rapier.
亚巴顿 could hold his Rapier for a long time in team fight due to his 回光返照 and 无光之盾.
哈斯卡 has huge magical resistance and attack speed increase under low HP and might be capable of holding a Divine Rapier when the time calls.
巨魔战将, as a moderately tanky hero, has massive amount of attack speed and great bash potential. Divine Rapier brings the damage he needs to make short work of his foes.
List of heroes that is not suggested to buy or hold a Divine Rapier:
Heroes with slow attack speed but massive attack damage, such as 小小, 斯温, 孽主 and 裂魂人.
Heroes using illusions, since illusions do not benefit from raw attack damage. Some examples are 混沌骑士, 恐怖利刃, 娜迦海妖 and 幻影长矛手.
A special mention goes to 天穹守望者 since 风暴双雄 no longer copies Divine Rapier.