I know there's a tier list here for best units for each class but is there a tier list for each series? Especially the orc, silverwing & dragon series since we get free shards for them. Example is the best unit for silverwing is archer but who should I pick next if I already have him. Or as for dragon I think it's wizard & warlord but I don't know who to get next.

For reference here are the units that I have:

• Warrior: 5* Beast, 4* Snow
• Rogue: 5* Seraph, 5* Snow, 4* Dwarven, 4* Beast
• Archer: 6* Fury, 6* Silverwing
• Defender: 5* Silverwing, 4* Orc, 4* Beast, 4* Poison
• Wizard: 5* Dragon, 4* Silverwing, 4* Beast, 4* Poison
• Golem: 5* Orc, 5* Beast, 4* Crown
• Warlord: 6* Dragon, 4* Beast, 4* Poison (currently halfway for Fury)

I'd also appreciate advice on who to get with the daily 100 4* shards ticket and if I should buy anything with the diamond shop (currently have 900 gems).