use Full Speed for best assault/bombardment results.
sail up to one hex offshore of your target at cruise/remain on station. next turn, set destination to the target, switch to full/remain on station, & set BombTF flagship's floatplanes to night recon of target hex.
-BombTF at fullspeed will use nearly all its ammo, at mission or cruise speed it'll use less. if you're set to remain, the TF won't accrue damage as it withdraws at fullspeed, instead it'll remain inside your (hopefully robust) CAP umbrella. next turn, allow it to rtb to re-arm, in convoy w/ any emptied transports from the AmphTF.
-AmphTF at fullspeed starting from adj hex will use its available ops points for unloading instead of traveling.
for even better results, sail right in to your target hex, w/ the BombTF set as a SurfTF, & the AmphTF set to 'do not unload'. CD Guns usually won't bother you if you arrive in their hex & do nothing, but you'd best be confident that the hex is mine-free if you do this. AmphTFs will have even better unload speed, as they can begin unloading before the night-turn naval movement phase.
of course you'll want to adjust my assault recipe for your local conditions.
ETA: more specific advice.
< Message edited by jmalter -- 10/29/2012 4:07:37 AM >