U r doing right so far. Continue to park it at ASB, as emergency fund is not for investment, so no point to diversify it. Just max the return with low risk investment which u r currently doing.  Better Still, max it to rm200k . With your bumi privilege, don't bother with m2u saver, fd, or high interest SA. These are for non bumi who doesn't have access to ASB. Even non bumi is recommended to use asnb fixed price fund as emergency fund and forget bout the rest like fd or saving account.

If u feel more secure with 12mths, then u may choose to increase it. Depends on the purpose. Some may want to start a business, so they prepare maybe 1 year, 3 years or even 5 years emergency fund. Or some foresee they may get fired and will take time to get another job. So it really depends on individual circumstances. General rule of thumb, 6 mths is the guidance and probably may be good enough if ur job is very stable.

Not to forget what about any big expenditure that u might need in the next few years, like down payment for new car / house / further education / house renovation etc. This should be set aside as well.