How do i get rid of this pretender ?

[Bullock]

Since most of my xp come from SP i have no idea how to get rid of this pretender.

I m playing abysia so i have high fire, blood & earth magic and a pretender with high astral.

I m actually overwhelming his troops but his pretender is jumping from a territory to another and ofc killing everything without a scratch.

I m thinking of doing a "bleed" rush, i saw somewhere else it can have good results on pretender, but i need to catch him ... Or stuffing my pretender with astral & magic piercing stuff and try some paralyzes while some troops with some cold protect go on him.

Any better idea ? maybe some crafting idea or SC?