[quote=@Dark Light]
[@Lugubrious]
Old system 
HP = lvl X 2 (4hp)
EP = lvl X 3 (6ep)

So I can spend four to reduce the damage to two.
Then attack with my leftovers...?
[/quote]

Oh, I thought the Roggenrola was level 1, which would have made his HP 2 and his EP 3.  If he's level 2, then yeah, everything can play out as you said.