Cobalt...another real argument for it is getting those lab samples in...and be able to eat...
PA-34s are very good planes and yes It is engine failure that worries me the most in IMC...and the TSOI versions give decent OEI-climb and Ceiling for a small twin and they have dual alternators and a battery yes a single bus but it's very, very robust one to meet 14CFR 23...note I only mentioned the Seneca out of all the aforementioned...you can fly pretty heavy IFR on the PA-34...but it require immense judgement---not to be recommended for those who are not prepared...for sure...never flew one but
411A's 411 also seems more than adequate for commercial operations
Cirrus-in commercial operation...
I'd never contemplate it unless they want a 50% dispatch rate