Quote from DragonEater >>

Would you let a player character with the Dual Wielder Feat dual wield lances while on a mount?

 Sounds heroic, but wouldn't allow it myself. A lance is a really cumbersome weapon in itself. 

I am an experienced DM but still find it difficult to get both my players and me to "be on the same page" as to what "pillar" of the game we are on at any given time. Is there some method of letting everyone know if we are in roleplay, exploration, or combat at any given time.

Quote from Minotaur20 >>

I am an experienced DM but still find it difficult to get both my players and me to "be on the same page" as to what "pillar" of the game we are on at any given time. Is there some method of letting everyone know if we are in roleplay, exploration, or combat at any given time.

I would suggest not worrying about that too much. As the DM, it's important for you to plan for each of the three pillars so that there's variety in your campaign. However, sometimes when you don't expect it, a roleplay or exploration encounter can turn into a combat encounter, or a combat encounter could turn into a roleplay encounter, so that's something to be prepared for. What's important is that the players have a chance to do all three so the campaign has variety, not so much that they recognize which is which. If you tell them that it's supposed to be a roleplay encounter, for example, then you're going to put up some barricades against things they might have otherwise chosen to do. 

Is the problem that the party frequently railroads the story, or is it something else?

Why are there no CHA buff feats specifically for gnomes? Edit: That can be used in Adventure League.

How would a DM create a good shopping experience for the players? In the past the players have asked me if there's an item in stock, but is there a better way to do this?

As a DM, how can I have NPCs lie, charm, deceive or run an insight check on my players?

You should just roll the NPC's deception and the DC in the PC's passive perception.

Are there any overlooked, underappreciated, or otherwise noteworthy multiclass combinations that are more synergetic than they appear?

I have a question

At what level(s) do you get feats and how many feats do you get (I'm a paladin)

Quote from _line >>

I have a question

At what level(s) and how many feats do you get (I'm a paladin)

 when ever get an ability score improvement (so for paladin it would be levels 4, 8, 12, 16, and 19.) instead of gaining the ability score improvement, you can gain a feat. 

Quote from RerecRoseht >>

Are there any overlooked, underappreciated, or otherwise noteworthy multiclass combinations that are more synergetic than they appear?

 i dont really know what is overlooked. it is also a matter of personal opinion, and what story you want to tell, but here are some non obvious pretty good multi class combos:

druid/cleric

blood hunter (not official)/artifacter (part of ebberon rising from the last war source book)

warlock/rogue

rogue or ranger/fighter

how about a guide on being a liardfolk?? I'm doing a lizardfolk barbarian right now

How do i run a town?

Reveal the map, fog of war, wait for them to ask someone? What should i describe? Should i give them a map, or just list destinations?

Quote from Me_link >>

Quote from RerecRoseht >>

Are there any overlooked, underappreciated, or otherwise noteworthy multiclass combinations that are more synergetic than they appear?

 i dont really know what is overlooked. it is also a matter of personal opinion, and what story you want to tell, but here are some non obvious pretty good multi class combos:

druid/cleric

blood hunter (not official)/artificer (part of the Ebberon: Rising from the Last War source book)

warlock/rogue

rogue or ranger/fighter

 I don't quite see how blood hunter/artificer is a good combo. Just seems weird. I could very well be wrong, so correct me if I'm missing something.

Does the Wizard's Graviturgy Magic feature Gravity Well work with AOE Spells like fireball on multiple opponents? Does it work with spells that multi-target like ray of scorching? If I target the same enemy multiple times does it work multiple times? 

Gravity Well

6th-level Graviturgy Magic feature

You’ve learned how to manipulate gravity around a living being: whenever you cast a spell on a creature, you can move the target 5 feet to an unoccupied space of your choice if the target is willing to move, the spell hits it with an attack, or it fails a saving throw against the spell.

if you are wearing adamantine armor and a critical hit is treated as a normal hit can that natural 20 then be able to miss the player? Say they have adamantine armor, a shield and the shield spell, and able to get their ac to 27 with a nat 20 the mob only had a 25 to hit, would that now be a miss since the hot is treated as a regular hit and now their to hit is too low for the new AC of the player or would it still hit since a nat 20 is considered an automatic hit?

Hey, ichewyou! As I understand it, the answer to all of those is yes. 

Hey, Giffard! The key words there are "a critical hit is treated as a normal hit." As I understand it, that means it's still a hit. It simply means that they can't double the damage dice against you. The rules say that a natural 20 will always hit, regardless of the target's AC. There may be an exception to this with some sort of magic I'm not familiar with, but this doesn't look like such an exception.

That's why I'm asking. The spell Shield will add 5 to your AC, and if the hit is treated as a normal hit because of the armor, using the spell could raise your AC beyond their to hit even with a natural 20. If they roll a 20, but only have a +4 modifier their normal to hit is now 24, and with  the shield spell your player's new AC can be higher than their to hit even with that natural 20. The key words I'm looking at the critical hit is treated as a normal hit. Since the hit is no longer a critical hit normal hits need to still beat the AC of the person they are hitting.

The issue is whether or not a natural 20 will always hit even if it is not considered a critical hit anymore.

Will There Be the Artificer And blood hunter incorporated and maybe some new classes?