I think the least impressive Spell level for Clerics is actually the 4th level spell list. Trying to choose between Banishment, Freedom of Movement, Guardian of Faith etc. It just seems like I'm almost always better off upcasting a 1st, 2nd or 3rd level Cleric spell instead.
Freedom of Movement is pretty solid though. Especially if your party is using any forms of Difficult Terrain creating spells (Like Hunger of Hadar or Insect Plague) or fighting in areas where there is Difficult Terrain (Or enemies that create it). Not to mention the immunity to Paralyze can be invaluable in various encounters.
There's also a couple of great Domain spells at 4th level. Namely Wall of Fire and Ice Storm.
Trickery Domain is rough, not so much because it's a terrible Domain per se, but because the perks are all stealth and disguise related, instead of direct damage stuff or bonuses to their armor or weapons etc, and that stuff requires way more micromanaging.
The main flaw with Trickery Domain is that they themselves cannot benefit from all of the things. Like, the entire concept of the Domain is about providing tools for stealth... But Blessing of the Trickster can only buff someone else.
Nature Clerics felt similar, because they key off charming Plants and Animals, but there just aren't enough plants and animals in the game to make it feel like a clutch choice.
Nature Clerics at least get some neat spells;
Shillelagh and Thorn Whip are decent Cantrips.
Speak with Animals is a nifty thing to have to interact with various notable animals.
Spike Growth is pretty nice if you set it up properly (Stack it with Darkness or Fog Cloud to prevent ranged attacks and force enemies to run through it and die... And if they make it through, have a high Str character throw them back across it)
Sleet Storm is great CC.
Insect Plague can be decent.
Also, Nature Cleric's perks of Dampen Elements and Divine Strike are pretty neat. The former allowing some Reaction usage to mitigate damage and the latter being flexible bonus damage that can allow you to capitalize on various items or vulnerabilities (As well as Wet status)
Their Channel Divinty and 4th level spells kind of suck, but the rest of their perks aren't bad. I mean, you can't go too wrong running around with Spirit Guardians up bonking things with a Shillelagh buffed staff as a nice easy mono-stat character (Allowing flexibility with where you put excess attributes) - And while yes, you can dip a level into Druid to get Shillelagh on any Cleric, doing so does cost the 12th level Feat (As well as delaying all your class perks and spells by a level)
Knowledge Domain is probably the weakest domain, given their overall lack of good spells (Or even unique spells... Much like Life and War Domains many of their Domain spells are part of the Clerics natural spell list) and mediocre bonuses. Whereby outside of grabbing 2 levels on a Skill Monkey character for Knowledge of the Ages there's really not much going for them.
