So it's a good start. Looks like all should be possible (the ku\europe\west beams) in NI (ref maps flysat.com, you have probably checked that already).
But, 7 to 52 makes 45 deg, the t90 officially covers 40, and is getting weak towards the sides, needs to be adressed, extension lnb support? and hoping that 7 or 52 may be strong enough?, but there I know nothing, someone else here may have some useful hints.
Anyway, you got to do testing with the most difficult sats to get an impression how the t90 copes at the sides and at your location. Personally I would think about a dedicated dish for 52, that will let the t90 (and you :O) have an easy job with the rest.