I can totally picture making this on turn three with no defenses up into a (non-red) player with 2 to 4 power in play and bait them into "wasting" an attack on Saheeli only to have her stabilize the next turn and live a healthy and profitable life in my service
Until end of turn, it gains hexproof, reach, and "Whenever this creature becomes tapped, it deals damage equal to its power to up to one target creature." Instant Tamiyo's Safekeeping Target permanent you control gains hexproof and indestructible until end of turn
With Haruspex, whenever one of your creatures dies, you get to draw a card, no life loss at all
You'll still need to find a way around removal, but Temple Altisaur will take care of combat damage
All things considered, Ruric Thar arrives at number seven