Talk:Excalibur (Warframe)/@comment-98.16.238.147-20130628143129/@comment-1627247-20130629140227

You gain 25% of the base shield of 100 so you gain only 25 shield.

You lose 5% of total hp (not base hp) after adding vitality mod.

It's not really a fair trade.

Don't use the helm unless you like it for the looks or if you don't mind losing 5% of your total hp for 25 shield.