IBM LPAR Processor Issue (EC vs vCPU)

I have an LPAR and processor settings are as follows..

Available system processing units: 9.8
Available system processing units
(with releasable amount from other partitions): 9.8

Minimum Processing units : 0.1
Minimum Virtual Processors units : 1

Assigned Processing units : 1.4
Assigned Virtual Processors units : 4

Currently My CPU is pegged and on my TOPAS, I see that the ec% is 1400+ and CPU is 200% and I want to add more resources.

So here is my question :

1. Does it make sense to add more virtual processing units like increase 4 to like 8

Or

2. Does it make sense to increase the Assigned Processing Units from 1.4 to 4

So please suggest....