General

Which Link Skills are the Best?

So I just started in a new world, so I only have 3 character slots . Right now, I'm training my Mihile to 120 to make a UA Hero for the blessing and the stance link skill. That would take up 2 slots in my character thing. So... which other link skill should I get?

Cannoneer - Link Skill Pirate Blessing: Extra 15 STR/DEX/INT/LUK and 5% HP/MP
Demon Slayer - Link Skill Fury Unleashed: 10% Extra Damage to Bosses.
Phantom - Link Skill Deadly Instinct: 10% more Critical Rate

Please also post why in the comments

BTW I'm unfunded, like literally like 5mil mesos total, and I would like to boss in the future, and I would like to have a complete Lionheart set (emp)