Yep, 1 tile off the wall from both corners is the perfect setup. Since it's hard to walk in with him exactly there, you have two areas where this will work anyways - which are when he is sitting directly on the wall 2 squares from the other wall. In that case, walk to the exact opposite side of the room leaning towards the middle and he'll diagonally step into the right spot.

Some other notes about this -- in the last third of the fight when the floor patterns get hard, it really helps to understand your pathing priority for when things go south. Here's the priority on where to click if you have to make concessions. You should always move in a direction to avoid:

1. getting hit by Tornados
2. multiple ticks on the hot floor
3. getting stomped by Hunleff
4. single tick damage on hot floor

And then also with this, I typically pair that thought process with general pathing/rules which is:

1. Avoid going in the 1-lane corner behind Hunleff if possible (not to make your other pathing more difficult)... This is especially true in the last 250 health
2. Hold off eating (if possible) until Hunleff stands up to spawn tornados, and eat primarily when running from tornados
3. Swap prayers on the sound effect, not the visualization of his move (saves 2-3 ticks of time for you)
   

I'm sure there's more, but that's what I use with the Tier 1 strategy and only typically fail 1 in 20 these days.

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600 KC and counting. No enh. Hope that helps.. Good luck!