Hi, I'm not a lawyer but I think this website should be more useful at gauging the large firms in the country.

Asia Pacific Legal 500 2009/2010 - Malaysiahttp://www.legal500.com/c/malaysia

Perhaps you can give it a shot, or alternatively go google and type - Law firms in Malaysia. The first few search results are pretty good yardsticks at measuring sizeable law firms.

I've personally delt with Skrine (nice office btw), Shearn Delamore, Baker & Mackenzie (office in gardens, nice place!) and Zaid Ibrahim in my job function.