Top Lane Champions

1. Darius
   
   
   • Strengths: Strong laning phase, great 1v1 potential, powerful teamfight presence with his ultimate (Noxian Guillotine).
   • Tips: Focus on stacking Hemorrhage with your basic attacks and abilities before using your ultimate for maximum damage.
     
     
2. Fiora
   
   
   • Strengths: Excellent duelist, high mobility, true damage with her passive (Duelist’s Dance) and ultimate (Grand Challenge).
   • Tips: Look to split push and force 1v1s. Use Riposte to block crucial enemy abilities.
     
     
3. Malphite
   
   
   • Strengths: Strong engage and disengage, very tanky, significant area-of-effect (AoE) damage with his ultimate (Unstoppable Force).
   • Tips: Use your ultimate to catch multiple enemies in teamfights. Build tanky to survive in the frontline.
     
     

Jungle Champions

1. Lee Sin
   
   
   • Strengths: High mobility, strong early game ganks, great playmaking potential.
   • Tips: Use your Sonic Wave/Resonating Strike combo to engage. Ward hop with Safeguard for increased mobility and outplays.
     
     
2. Elise
   
   
   • Strengths: Strong early game pressure, good burst damage, versatile with human and spider forms.
   • Tips: Use your Human Form abilities to poke and stun before switching to Spider Form for the kill.
     
     
3. Kayn
   
   
   • Strengths: Versatile transformations (Rhaast for sustain and Shadow Assassin for burst), high mobility.
   • Tips: Decide your transformation based on the enemy team composition. Rhaast is better against tanky teams, while Shadow Assassin is better against squishies.
     
     

Mid Lane Champions

1. Zed
   
   
   • Strengths: High burst damage, excellent mobility, strong split pushing.
   • Tips: Use your Living Shadow to poke and engage. Combo your abilities to maximize burst damage.
     
     
2. Syndra
   
   
   • Strengths: High burst potential, strong laning phase, good crowd control with Scatter the Weak.
   • Tips: Use your Dark Sphere to poke and combo it with Scatter the Weak for stuns. Save Unleashed Power for critical moments.
     
     
3. Akali
   
   
   • Strengths: High mobility, good sustain, strong outplay potential with her shroud.
   • Tips: Utilize your shroud to dodge skillshots and reposition. Engage with your E and look for assassinations with your ultimate.
     
     

ADC (Bot Lane) Champions

1. Kai’Sa
   
   
   • Strengths: High mobility, good mix of physical and magic damage, strong late game.
   • Tips: Stack Plasma with your abilities and passive to maximize damage. Use your ultimate to reposition in fights.
     
     
2. Jhin
   
   
   • Strengths: High burst damage, good crowd control with Deadly Flourish and Captive Audience.
   • Tips: Use your fourth shot strategically for maximum damage. Set up traps and roots to control the battlefield.
     
     
3. Ezreal
   
   
   • Strengths: High mobility, safe laning phase, good poke.
   • Tips: Use your Mystic Shot to poke and farm safely. Utilize Arcane Shift to dodge skillshots and reposition.
     
     

Support Champions

1. Thresh
   
   
   • Strengths: High playmaking potential, good crowd control, versatile with his kit.
   • Tips: Use Death Sentence to catch enemies. Utilize The Box and Flay for zoning and peeling.
     
     
2. Leona
   
   
   • Strengths: Strong engage, very tanky, good crowd control.
   • Tips: Use your Zenith Blade and Shield of Daybreak to engage. Solar Flare is excellent for initiating fights or peeling.
     
     
3. Nami
   
   
   • Strengths: Good sustain with her heal, strong crowd control with Aqua Prison and Tidal Wave.
   • Tips: Use Aqua Prison to catch enemies out of position. Tidal Wave can turn the tide of teamfights.

General Tips for Picking Champions in League of Legends Arena

1. Synergy: Choose champions that complement your team composition. For instance, if your team lacks engage, pick champions like Malphite or Leona.
   
2. Counterpicks: Be aware of the enemy team composition and pick champions that can counter their strengths. For example, if the enemy has a lot of healing, pick champions with healing reduction abilities.
   
3. Comfort: Play champions you are comfortable with. Mastery of a champion often outweighs theoretical strength.
   
4. Current Meta: Stay updated with the current meta. Champions that are strong in the meta are often prioritized in picks.
   
   

By considering these champions and tips, you can increase your chances of success in League of Legends Arena. Remember that practice and familiarity with your chosen champions will significantly enhance your performance.