Gold and Boost experience points farming are important in the game MarveL: Future Fight. Thanks to Redditter optimike04, below there is a full list of which missions reward the most gold with and without boost and how best to use the limited excess boost. ( PSA: World Boss Invasion is a great way to farm gold and random bios and it seems the level of chest you get is tied to how many T2/3s people bring). And if you need Cheap Marvel: Future Fight Crystals, 5mmo.com should always be your first chioce.
 
Here are some other notes highlighted by Redditter optimike04:
 
1. Using clear tickets on daily missions for gold and exp chips is the best way to maximize your gold farming with or without excess boost is priority 1.
2. Using clear tickets on Mr. Fantastic Epic Quests is priority 2 except for the Doom's Day mission which has the same gold output on auto play ++ (obviously if you need victorious bios, you should not use clear tickets) (PSA: also if you weren't aware, you can force closing the game to keep your entry and rinse and repeat until a shifter appears)
3. Dr. Strange's Epic Quest is priority 3 for using excess boost and Ancient One is the best memory mission. Clear tickets are optional as the difference between autoplay++ and clear tickets is small and some may prefer to manually run in order to earn uni exp or because they are short on clear tickets.
 
4. Of all special missions, it seems Kraven consistently gave me the most gold and clear ticketing is the way to go if you can afford it.
5. It seems hidden routes make no difference on gold output
 
Note: If there are holes in the table, it's because they are probably not great for farming based on similar missions/results.

Running on	Autoplay++			Clear tickets
	Boost >100	Normal boost	Net benefit	Boost >100	Normal boost	Net benefit
Daily Mission	334313	262307	72006	338313	268660	69653
Magneto's Might	5453	4436	1017	5586	4430	1156
Rise of the Phoenix	10876	8637	2239	10876	8637	2239
Mutual Enemy	23728	18843	4885	23728	18843	4885
Chrome Plated Comrade	4911	3917	994	5021	3987	1034
Psy-locked out	5066	4023	1043	5198	4128	1070
Cutting Cable	10876	8637	2239	10876	8637	2239
Ending Stryfe	5594	4442	1152	5594	4442	1152
Beginning of the Chaos	23728	20239	3489	23728	20239	3489
Inhuman Princess	22467	17841	4626	24000	19059	4941
Mean and Green	28857	22916	5941	34212	27168	7044
In the Shadow of Doom	22395	17425	4970	23752	18862	4890
Latverian Champion	24742	19276	5466	26416	20977	5439
Doom's Day	44077	35002	9075	44077	35002	9075
Mordo					18843
Wong				23728	18843	4885
Ancient One		18843		24799	18843	5956
Kaecilius	23720	18276	5444	23728	18843	4885
Satana	23300	18503	4797	23728	18843	4885
Hellstorm	23300	18276	5024	24799	19693	5106
Gorgon		10968		14006	11122	2884
Karnak		10660			11122
Crystal		10608			11122
Moon Girl		10968		14006	11122	2884
Maximus		10660		14489	11506	2983
Sandman		10814		17588	13967	3621
Lizard		10739		17685	14044	3641
Kraven		10814		17975	14274	3701
Rhino		10814		17782	14121	3661
Mysterio		10968		17491	13890	3601
White Tiger		9435		11978	9512	2466
Wiccan		9368			9512
Hulkling		9358			9512
Songbird		9512			9512
Squirrel Girl				11978	9512	2466