As it is a set of 4 (actually I thought it would be a 3-set!), I would clearly prefer to have 2 barrier and 2 shield. Cannot let one damage type reduction (DEF/MR) open. Maybe the next run gives me some barrier - all 8 I have are shield.

But do not start the next dungeon now, just have seen server restart in 25 minutes!!

Ok so this server thing is then considered as "normal"? Oh man...they should get the servers in a proper shape - these time restricted dungeons clearly need stable servers!