First off, you asked what it better- Basalt Kerbecs BD145CS
This is a superb Defense combo(an Aquario would be nice though), and so anyone would assume you are asking for one of the best BD145 Defense combo's comparison with another Defense combo on CH120.
I agree with you that BD145 hinders attack, but for that we have R145.
I will never suggest CH120 for anti-meta attack involving Basalt.
CH120 already drops down from 145 to 120 upon a big impact.
A heavy Basalt would aggravate this condition, and CH120 would be unable to stay in 145 mode...
This is a superb Defense combo(an Aquario would be nice though), and so anyone would assume you are asking for one of the best BD145 Defense combo's comparison with another Defense combo on CH120.
I agree with you that BD145 hinders attack, but for that we have R145.
I will never suggest CH120 for anti-meta attack involving Basalt.
CH120 already drops down from 145 to 120 upon a big impact.
A heavy Basalt would aggravate this condition, and CH120 would be unable to stay in 145 mode...