Dragon_warrior, take it from me, I've been a longtime lion user and I've done some extensive testing with different Chimera builds (I've also been top 10 three times using a lion comp). The best build and I would argue the only viable build that exist at present is lvl5 Chimera w/ chastisement & focus and 2x lvl 31 sparkling with luminous heal. Here's why:
Again like I've been saying for weeks now, Chimera is woeful until lvl 4 it needs severe ap cuts before that lvl (chimera should have smallest ap of any legendary unit up to lvl 4).
Worg can 2 shot any lion unit except kotl, with implacable and a bad deployment is gg. Though it can be dpsed down quite fast its all a matter of luck on the deployment really unless both players are good then you will have a nice game.
Golem is... ah whats the point, it does as much dmg as the worg but it takes more dmg and has perma ring of ice. "But its vunerable to archers with ferocious". Not everyone uses arcchers in their comp, they should have a chance to play a good game, not really depending on ring of ice not proccing.
I just dont see legendaries being viable as they are for 400 bracket.
Now if the ranked bracket was 500 maybe then people could pack some extra legendary counter measures (I would so bring a IoJ valk if i had an extra 100 ap to use).