You don't want to use GMP if you only have 1k dps even at low level. Go for LMP until your dps is much too high.
There are some easy ways to level as a wander:
and Herald of Ice. You won't need any auras, not even a weapon. Just make sure you have an Engraved Wand and try to get crit (and ideally attack speed) on it.
You will only have around 2k life at Merciless but can push 1k-5k Chain DPS at level 40-60 rather easily. Depends on whether you are willing to run a Tabula, which just sky rockets everything.
Oh and there is Meginord's. Pretty insane as long as you can afford the lack of resists. Honestly, Meginord's could theoretically compete with Maligaro's (it can't, don't get me wrong - but almost).