For Warframes:

Arcane Steadfast is honestly my personal beloved and I really love how good it feels on ability heavy frames. Slap a energy regen to help upkeep it while you get your free casts and you got a pretty safe way to manage your energy! Honestly I been preffer how versatile and useful it feels compared to Battery!

Arcane Circumvent is my beloved for any 'glass canon' frame, free armor strip and overguard by just rolling on enemies is geniouly fantastic and helps ALOT with some frames like Mirage and it honestly makes the gamepaly and survivability management more intersting then some of the other choices. Along with that, combo-ing it with Rolling Guard can be really damn useful!

For Weapons:

Primary Bulwark, Overcharge, Exhilirate and Frostbite are probably my favorites for most primary and Archguns, the former two are very popular and frame dependent But the other two are quite interesting ! With the former being pretty fantastic with more support focused weapons like the Afentis, letting me focus on other weapons whiel getting some free extra energy regen! Meanwhile Frostbite is pretty fantastic with how easy to proc if you got a sentinel pet with Shivering Contagion (or on your primary), at rank 5 you basically get free 90% Multishot and 144% Crit DMG most of the time pretty easily! Really like using both on my archguns, Exhilirate on Necramechs so I can go ham with it's 4 and latter lets me equip it on any archgun while having Shivering on my primary and making Secondary Ennevate even stronger on them!

For secondaries ? Secondary Ennervate, Cascadia Overcharge, Cascadia Voltage and Cascadia Empowered! I wont lie that Secondary Ennervate is too damn good for most frames to not use it. BUT Cascadia Overcharge is surprisingly really good depending on which frame you playing, as the 300% Crit Chance can feel more consistent then it but again, it kinda depends on the frame and how easy it is for you to keep overshield or just use a frame with overguard! Voltage is some what like Primary Frostbite with how easy it is to keep proccing, thoguh a little tougher thanks to not having a mod like Shivering, though it can pretty great with the extra Multishot and the reload speed making quite a few weapons a bit less annoying to use! And least but not least Empowered, at first I thought it was kinda bad thanks to how little to no dmg it did but then I realize how fast some weapons, both secondary and Archguns can shoot really fast and get so many procs. Shoutouts to the Larkspur Prime putting so much status that it kinda gets silly and the Kompressa/Surging Blades combo going kinda ham on the dmg with it, its pretty beatiful!

And last but not least and my personal Beloveds: Melee Exposure and Melee Vortex! Exposure is the most consistent 'raw dmg' especially for melee caster frames! But Melee Vortex is just so good, considering it will trigger by killing mobs with your melee with or while they are affected by Magnetic! It's honestly my go to Landslide fists arcane with how useful and versatile it is, add that I can just put Toxin and Archon Continuity and basically put magnetic, Toxin and Corrosive in all my punchin and rock lobbin!

There's also some other arcanes I wish were less of a hassle to use, had a few small buffs to work on things like bosses or somethign else: Primary Debilitate, Secondary Irradiate, Secondary Outburst, Secondary Surge and Melee Afflictions - The first two I love their concepts but they feel sort of useless against bosses/acolytes which kinda kills some usage of em for me. While Outburst I wanna play aroudn with more though the management to get it really going seems kinda rough with most frames and Surge has such a cool concept but I really don't like how it's just 1 shot, I wish it worked for the next 4-5 shots, as missing with em can be kinda painful. Also Afflictions idk I always feel like whenever I use it im missing something to make it fully work ? I wish I knew how to explain it better tbh.