Batting - average
What's better for the team - someone with an average of 40+ at a strike rate of say 70, or someone with an average of 5 but a strike rate of 250...
Bowling - harder to call
You've gone to an extreme there, not sure there is anyone on the planet with SR 250 and average of 5
A fairer dilemma would be say
1. SR of 150, average of 25 vrs
2. SR of 100, average of 35 vrs
3. SR of 50, average of 45
Ive played with batsmen in each category. I was SR 85ish average 34 ish last season
What I will say is that the bottom stats might be handy in lower club or village cricket where the pitches might be suspect or a tail might start at 6. When you start to play a higher level of limited overs cricket on better pitches a SR of 50 is most definitely not acceptable when batting first.
I bat 3 or 4 and Id much rather have the 1. stats listed above batting before me than number 3.
With bowling I think if you keep the runs down chances will come. Obviously an attacking strike bowler is great to have in your arsenal but give me 3 or 4 line and length merchants any day. Set the field properly and take your catches