It depends on how you look at the numbers.
The number published of 387 is the total reduction off today's Seniority list they want in 12 months time. Based on a predicted schedule.
There are about 110 Regional Pilots who, while on the Jet Seniority list, are still employed in the Regionals and are thus on "LWOP" from the Jets. So the actual reduction is ~280 Flying Pilots, this is before Retirements and other measures such as Early exits or LWOP are counted, so the actual number of Redundancies could be 200 or less (active Jet Pilots). The 110 Regional Pilots will also be "made redundant" if their number falls within the final number (most of them probably will), but it's mostly administrative as they'll retain their Regional Commands and will added back onto the Jet List in Seniority order.
A 30% reduction in the Airline does not necessarily equate to a 30% reduction in Pilots. Partly because we were short on Pilots to begin with, but also due to the logistical issues of downtraining. Add in some of the Manpower planning requirements the company has agreed to (still to be ratified by the Pilots), redundancies should be a lot less than 30% under the current forecasts.