You approach the gains the same way, use the default (which works pretty well in most cases) and bump up from there till you get some shimmy then back it off.
Same with the tail.
As for the heli itself, the 5 blade head will provide more lift so you'll probably need a bit less pitch or you will find it sensitive in the collective range, same with aileron/elevator throws.
Thats the nice part about the Axon, when you go through the wizard it will walk you through nearly everything you need to do including some default gains for different style setups, blade sizes etc.
Tail response on my 4 blade 58 is about what my 2 blade Jet Ranger was but a lot depends on the servos you're using, tail blades etc.
I'll tell you this, having done this a few times, if we could hang out at the field I could have you setup in about 15 minutes of flight time or less.