Magby is used very differently than Elekid.
With an Elekid sweep, you're trying to weaken the main walls, and taking out the scarfers on the opposing team, and then clean up with STAB Tbolt and Ice Punch
Magby, on the other hand is simply
1. Send Magby in
2. Flare Blitz
3. ???
4. PROFIT
Seriously, all you do is use Flare Blitz, which will do tons to even stuff that resists it. Houndour giving you troubles? Mach Punch is an OHKO with SR, and im sure without SR it comes pretty close.
Basically, what HYU said: Just smash away with your main STAB, use coverage moves other wise. Against Gligar, unless they are scarfed, just hope for the speed tie and KO with HP Ice. noone switches in Gligar on Magby anyways, it takes shitloads from Overheat
Yeah, DONT UNDERESTIMATE MAGBY. although you're more than welcome, just means you'll be losing to franky and me :)