Finally had a match of Sacred valley in the chaffee and man its a brick hard map to play first time round with nooks high vantage points and nooks and crannies everywhere.
Replay.
I just about survived and spent most of the match rallying around like a madman and not doing a lot of shooting, still third highest xp earned on my team so could have been worse.
Also bought the SU-100 and have fitted the 100mm but it doesn't really seem all that much different to the SU-85 so far tho hopefully it'll come into its own when I unlock and fit the 122mm gun.