Honestly, Samuel is really overrated. He's not a good hero. At all. He's just the common link in many good things. Gideon gets far more rescues just because CM, HP, and Writ can't touch him, and he still gets the benefit of the D2 off of Prof Oak. Samuel requires waay too much support to be made truly useful. The D2 in Samuel's is only every once in awhile, and once you've pulled out David and King Saul (if you have multiples whatever, you're probably not going to be able to search for them every time), you should probably be rescuing with Gideon, not Samuel, since Gideon can actually make full use of Samuel's Edict while at the same time make full use of his special ability (or rather, Prof Oak's special ability).