In fairness, most complaints seem to be directed towards martial multiclassing.
Do you have any showcase MC builds that does not involve spellcasting classes, pluto?
There are some nice ones, like the crit meister in OP!
I like half orc 3 fighter/17 barb a lot. Great weapon fighting style, action surge, Crit on 19-20 from fighter, which works GREAT with Brutal critical 3 and half orc critical, doing an extra 5d12 reroll 1s and 2s on crits.
12 Paladin/8 fighter is nice for the improved divine smite, lots of ability score increases, extra fighting style and crit range or superiority dice.
half orc Rogue assassin 3/frenzy barb 17 is great to, since it makes for a nice surprise round with auto crits, but too bad about needing a finesse weapon for sneak attack.
Rogue Assassin 8/Paladin 12 is cool, again with the hell of a first round doing 1 attacks of (1d8+5D8+4d6)x2, +7 and another 2 attacks with of (1d8+5d8)x2, +7. Thats ~89 damage for first attack, and ~61 from the other two, breaking 200 damage in the surprise round!
or Assassin 4/Paladin 16, for less sneak attack, no evasion or expertise, but more smites and a sweet paladin oath feature.
I like Ranger/rogue combos too, like 5 ranger/15 rogue, or 17 ranger/3 rogue
Paladin 14/Fighter 3/Assassin 3 for duel wielding crit range goodness works, also has a killer first round (self hasted/action surged 6 attacks all autocrits!), but few ability score increases.
Disappointed with monk multiclass combos though, seems like its best to stay pure on that one.
