if Dante is in the army Sanguinary Guard become troops
seeing how you running Dante I'd drop the libby and termies and add a chaplain and more priests, toss in a few infernus pistols, give the chappy and a priest a jump pack and add them to Dante's group, put another priest with an assault squad if you have the points get vanguard and put them in the storm raven with the heroic intervention and a priest nearby they get the benefits of feel no pain and furious charge as it's a 6" bubble.
A DoA army I used that worked well for me looked like this
HQ
Dante 225
ELITES
Chaplain with Jump Pack 125
x2 Sanguinary Priests with Jump Packs 75 (150)
Furioso Dreadnought with Magna Grapple, Heavy Flamer and Blood Talons 150
TROOPS
Sanguinary Guard with Chapter Banner 230
10 man Assault Squad with sergeant with Power Weapon and Infernus Pistol and Marine with Infernus Pistol 235
10 man Assault Squad with sergeant with Power Weapon and Infernus Pistol and Marine with Infernus Pistol 235
FAST ATTACK
6 Vanguard Veterans with Power Weapons, 2 with Inferfus Pistols sergeant with Glaive Encarmine 300
HEAVY SUPPORT
Storm Raven with Twin Linked Assault Cannon and Twin Linked Multi Melta 200
It's a pretty tough list and very unforgiving if the deepstrike gods are disliking you, but it hits hard and hits very fast your looking at close combat in turn 2 and with all the power weapons it makes a mess of everything