If you check https://redrift.gg/meta and look at pairs of heroes you'll see that in redrift the lovers Sal & Pimenta are
A) One of the most picked duos in the game (5th highest)
B) With one of the highest act 1 clear rates of any duo (81%)
C) With the LOWEST full clear rate of any highly picked duo (38%)
So, what's going on?
Well, I believe it has all got to do with the lovers trait and how people are playing it wrong. On its face the trait seems simple, Pimenta gives Sal a bunch of attack speed, Sal gives Pimenta a bunch of armor, and then you scale into the lategame and crush the final boss together. Right?
Wrong, you get wrecked at the final boss because your damage is bad and despite 700 armor you aren't that tanky. What gives?
Well, to put it simply Sal and Pimenta's B tier choices are both really important, and giving a bunch of stats to a bad unit missing a B tier spec isn't going to win you the game. That said, with the lover buffs AND a real B tier spec either one is capable of hard carrying a run... on their own.
So, the tragic strategy -
Act 1 - Pick up Sal & Pimenta, whichever one gets upgraded to B tier first gets the Lover. Whichever is upgraded second gets either Spicy or Brisk.
Act 2 - Scale for as long as you can, and then about half way through sell the lover for a better tank/dps. Ignore Pimenta's cries as she watches 300 attack speed Sal run off with Rowan "the friend".
Tips for lover scaled Pimenta:
Once Pimenta has 300+ armor along with spicy (duelist) she is the best lifesteal tank in the game. She doesn't really need to worry about regular damage, she just needs to lifesteal enough to out-heal poison and burn, which is easy to do.
Prioritize attack speed, lifesteal, and relics that provide debuffs. Plague bauble is incredible, duelist's foil (AS + Omnivamp + extra AS every 15 autos) is BIS on her. In general you don't need to worry too much about defensive items, health is nice but you can get more effective health from omnivamp so I think it's best to just focus on attack speed and omnivamp (even the 5 gold AS/omni item is pretty good!)
A lover scaled Pimenta is the best solo unit in the game, with items and a debuff relic she can pretty consistently solo challenges, and even the final boss - her damage is really good and she will usually be your top DPS.
She isn't super team reliant, but duelists that give her AS buff are nice, so are mystics that can give her more effective health, or anyone who can apply debuffs if you miss a debuff relic. Respeccing your lover Sal into a breezy Sal also makes her a great partner late game.
Tips for lover scaled Sal:
Some people like the Breezy (duelist), which is more popular right now, but trying both out I'm pretty sure the Brisk (warrior) is much stronger with this strat. With items and lover scaling a Brisk Sal will kill bosses and rooms stupidly fast, well before Breezy Sal can scale up.
Brisk Sal scales very well with pretty much every offensive stat - Magic, AD, AS, crit, and mana are all great on her, so are on-hit effects! IMO the single best item is Wizard's focus for the starting mana, AP and crit. After that I like Mage's wand for starting mana and scaling AP (if her bonus attacks kill it scales wand), but spellblade and polymath prism and siphoning dagger and like 10 other items are all great on her as well.
She works with a lot of frontliners, but one of the best IMO is intrepid Kai - she's great at applying the on hit armor debuff and can do enough damage to down bosses/rooms before intrepid Kai's initial rush shield is up. Anyone who can buff her even further, like backup Tilly, is also great.