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Stryker, the best way is a lot of care when approaching these bugs and for sure the choise of the lens+tubes with the larger possible working distance to the subject (from the tip of lens to the subject). Most of times for more accurate focusing and avoiding blur (when no flash is used) the use of a tripod is a great plus.
This is a real life "experiment" with my old Nikkor-P 105mm f/2.5 (Sonnar) + tubes:
Jumping spider with old Nikkor 105/2.5 P (Sonnar design) + tubes por labecoaves, no Flickr
D7100 + 36mm+20mm Kenko tubes + Nikkor-P 105mm f/2.5 F aiŽd & CPU'd + buitl in flash + diffuser, hand held, ISO 250, f/8 at 1/60s, ~50% cropped. This tiny spider had less than 1cm of length.
The internet has some people stating this older design is a poorer performer at short distances than the Gauss' 105/2.5, but I think it did the job reasonably well with the tubes.