Rambo is essential to captain as long as factions remain so woefully imbalanced. People forget why rambo started in the first place; prior to Khuzait getting the buff to spearmen (like 7-8 months ago) they were considered one of the worst factions in captain, and the only way to win with them after khans/archer kiting was nerfed (~summer 2020) was efficient cav play. The best way to do that by far was to rambo your lancers, the best unit for an individual to control in captain when played as rambo.
Today, and for the past several months, Khuzait has been the best faction, with Sturgia a close second. Empire has fallen from its glory days and is now arguably the worst with Aserai and Vlandia also in contention. Battania is firmly entrenched in the middle though struggle mightily in some matches (like Sturgia) on certain maps. Rambo is always the answer when rolling or choosing one of the lesser factions against a top faction, where one mamuluke played effectively can wipe an entire group of OP lancers if the players' skill is good enough. The longer spear on battanian cav is a great tool to have where 2-3 player lives can make the difference against lancers, which have a significant advantage against the batt cav AI. With a ridiculously unbalanced game ramboing is legitimately the only way to win in many situations, especially considering that so many factions lack hard counters in a number of matchups on infantry (vlandia and aserai lack quality blunt weapons, for example, so get absolutely destroyed in melee against khuzait).
Personal skill should matter in captain and better teamplay can overcome rambo. Archers weren't a great pick in captain even before rambo cav became the predominant meta as the infantry rush meta would just counter archers anyway. And to be honest archer gameplay in captain is exceptionally boring; it's relevant and to a degree exciting in skirmish because it actually works as a support unit there and not as the gigantic liability it usually is in captain.