Samatta would bang them in at that level. Ally was scoring in the Champions League in the last twelve months, it’s a different world but I’d say in the Championship we could be looking at maybe 15-20 a season.
For comparison do you reckon James Collins (the striker, not the ginger defender) or Daniel Johnson, who are banging in a very decent 10-15ish Championship goals with Luton and Preston, could slot into a CL team?! Not a chance. IMHO you’re being much too harsh on a fairly new signing.