Be warned - Guardian is not the best choice for this playstyle due to the lack of a charisma mastery. Unlike common believe the lack of intelligence is not that much of a concern, because there are pletty of lifesteal skills that allow your dragon to replenish his health points without relying on your soul skill based heals. The entire build centers around your dragon as your butter and bread, which means the cornerstones are: crowd control, chain attacks, staggering and (de)buffs. I'm personally not a fan of it due to the dragon AI being flawed and because it takes way longer to be efficient compared to other builds. You need a fully trained level one hundred dragon with max roll. A requirement no other playstyle has for your survival. You should note that you will gain a summon time of over thirty minutes and that charisma caps at tousand points, so investing more will not gain you any benefits.