I have two sets of ratchet ring spanners. fixed and swivel. Always handy down the side of the engine when clearance for a socket and ratchet is not big enough.
These work well, but of course a ring spanner usually does in this situation.
Time for a battery impact wrench, Mr Spanner......I've a nice 18v Hitachi.
Once you've used one you'll wonder why you didn't get one before!
John