HT solo as Aran?

This.

Harder on an Aran perhaps but leave the Cornians alive in case you get seduced into the corners. Do not buff BP or you will avoid their attacks (which you prefer over 1/1 HT hits).

Kill Leg ->Tail -> Wing/Right Arm and then when you're killing Right/Middle Head, you wont' get seduced. By the time you go to kill the left head it's the only thing that can attack you as you're seduced.

Don't forget Combo Unlimited -> Spam Tempest at the beginning.

cant stress the bolded part enough.

 Spoiler

I do the same as above (keep the cornians alive so that they hit you instead of rocks)
You could also
-level up Hero's Will if you haven't already
-Use resistance potions
-Bring Cleansing potions (I believe these are the ones that fix seduce)
-I've been told holding down certain keys make you lag so hard that you don't take damage. Pretty sure it's either alt+tab and/or quest hotkey.
-Consider getting or borrowing Decent HB
-Raise willpower, use demon slayer card, etc to raise resistance.
-Consider getting -abnormal status from either empress set, potential, or nebulites.

this guy has good advice, follow all of it.