One example is setting up advantage for a rogue's sneak attack. Besides the Help action, possibly from a wizard's (or warlock's) familiar, there's also Guiding Bolt, from the Cleric spell list (also an option for Divine Soul sorcerers from XGE).
Of course, if Guiding Bolt misses, then this plan fails. There are several ways for the team to boost the Cleric's chance to hit. Presumably cleric is running Bless. Bard gives Bardic Inspiration. Divination wizard uses Portent. Wild Magic sorcerer uses Bend Luck.
Dark One's Own Luck (Fiend Warlock) and Tides of Chaos (Wild Magic Sorceror) are, alas for this thread, self-only.
Sharpshooter can do extra damage with penalty to hit. As above, there are ways for teammates to boost the chance to hit, by modifiers to the roll and/or by granting Advantage.
Most of the above methods can also boost a grapple check. Cleric can use Guidance instead of Bless for grapple check (especially if party prepares then initiates combat). Perhaps the grappler is a raging barbarian, for Advantage, or a druid wild-shaped as a bear. A teammate can give the target disadvantage, on the target's roll to resist grapple, if the teammate can impose the Frightened condition. Some examples: Paladin of Conquest uses Conquering Presence. Any paladin hits with Wrathful Strike. Archfey warlock uses Fey Presence. Other methods?
Of course, if Guiding Bolt misses, then this plan fails. There are several ways for the team to boost the Cleric's chance to hit. Presumably cleric is running Bless. Bard gives Bardic Inspiration. Divination wizard uses Portent. Wild Magic sorcerer uses Bend Luck.
Dark One's Own Luck (Fiend Warlock) and Tides of Chaos (Wild Magic Sorceror) are, alas for this thread, self-only.
Sharpshooter can do extra damage with penalty to hit. As above, there are ways for teammates to boost the chance to hit, by modifiers to the roll and/or by granting Advantage.
Most of the above methods can also boost a grapple check. Cleric can use Guidance instead of Bless for grapple check (especially if party prepares then initiates combat). Perhaps the grappler is a raging barbarian, for Advantage, or a druid wild-shaped as a bear. A teammate can give the target disadvantage, on the target's roll to resist grapple, if the teammate can impose the Frightened condition. Some examples: Paladin of Conquest uses Conquering Presence. Any paladin hits with Wrathful Strike. Archfey warlock uses Fey Presence. Other methods?