i played Inter with V4 tactics , so far i have great defense , maybe because i have 2 superb DC in my team (lucio + samuel).
before match i always edit O.I , if you`r lazy maybe you should hire "Best" Asst Manager to auto pick O.I for you.
using this tactics (V3) in World League Database (11.3) using Dortmund as Team.
10 matches so far without lose , scored 40 , conceded 0. my DCR defender (Mats Hummels score 12 goal from Heading o.O its insane)
so far V3 is worked fine for me.