A Ranger->Cleric will lose to a Ranger/Cleric.
Both can Specialise in their Weapon Type Proficiencies.
Both can cast Clerical and Druidic spells.
BUT, only the Cleric/Ranger can obtain Warrior HLAs. A C/R with Armour of Faith + Defender of Easthaven + Hardiness is a very, VERY tough nut to crack. Especially if you cast Regeneration beforehand.
A Cleric/Ranger can also what I like to call... summon the Divine Bazooka of Doom. Cast Fire Seeds and activate Greater Deathblow. Watch in amazement as you suddenly realise he holds in his hands... the ability to kill Beholders and Mind Flayers instantly( no Save, ignores MR) and it is
AoE to boot!
1) Sorcerer
2) Kensai->Mage
3) Cleric/Ranger
4) Cleric/Mage
5) Kensai->Thief
6) Blade