You question makes me a little nervous....smacks of "i don't want to learn how to take off or land, just how to turn and go up and down" (M Atta, 9/11)
In short, if you are turning, your rate of climb will decrease for a given power setting, you rate of descent will increase, for a given speed.
The higher you go the lower your rate of climb, until eventually you stop going up. The angles involved are relatively shallow and so have little effect on groundspeed.
Coming down is rather easier, gravity is helping. You can go as fast as you like without tearing off the wings. If you get your dive steep enough you can reduce your groundspeed to zero, but your airspeed will increase very quickly!!! Furthermore, all the passengers will join you in the flight deck!
In airline terms, ROD is shallow enough to have negligible effect on groundspeed.
most airliners will be stressed to around about 2.5g. You can work out turn performance from that and a top speed of say 340Kts/M.84 call it 500Kts TAS as a max for ball park figures. If you are any good at maths you can work out the theoretical turn rates and radii from that. These may not be sustainable in level flight though.
Are you thinking of doing some widebody air combat?